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Hammann N, Lenz D, Baric I, Crushell E, Vici CD, Distelmaier F, Feillet F, Freisinger P, Hempel M, Khoreva AL, Laass MW, Lacassie Y, Lainka E, Larson-Nath C, Li Z, Lipiński P, Lurz E, Mégarbané A, Nobre S, Olivieri G, Peters B, Prontera P, Schlieben LD, Seroogy CM, Sobacchi C, Suzuki S, Tran C, Vockley J, Wang JS, Wagner M, Prokisch H, Garbade SF, Kölker S, Hoffmann GF, Staufner C. Impact of genetic and non-genetic factors on phenotypic diversity in NBAS-associated disease. Mol Genet Metab 2024; 141:108118. [PMID: 38244286 DOI: 10.1016/j.ymgme.2023.108118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 12/17/2023] [Accepted: 12/18/2023] [Indexed: 01/22/2024]
Abstract
Biallelic pathogenic variants in neuroblastoma-amplified sequence (NBAS) cause a pleiotropic multisystem disorder. Three clinical subgroups have been defined correlating with the localisation of pathogenic variants in the NBAS gene: variants affecting the C-terminal region of NBAS result in SOPH syndrome (short stature, optic atrophy, Pelger-Huët anomaly), variants affecting the Sec 39 domain are associated with infantile liver failure syndrome type 2 (ILFS2) and variants affecting the ß-propeller domain give rise to a combined phenotype. However, there is still unexplained phenotypic diversity across the three subgroups, challenging the current concept of genotype-phenotype correlations in NBAS-associated disease. Therefore, besides examining the genetic influence, we aim to elucidate the potential impact of pre-symptomatic diagnosis, emergency management and other modifying variables on the clinical phenotype. We investigated genotype-phenotype correlations in individuals sharing the same genotypes (n = 30 individuals), and in those sharing the same missense variants with a loss-of-function variant in trans (n = 38 individuals). Effects of a pre-symptomatic diagnosis and emergency management on the severity of acute liver failure (ALF) episodes also were analysed, comparing liver function tests (ALAT, ASAT, INR) and mortality. A strong genotype-phenotype correlation was demonstrated in individuals sharing the same genotype; this was especially true for the ILFS2 subgroup. Genotype-phenotype correlation in patients sharing only one missense variant was still high, though at a lower level. Pre-symptomatic diagnosis in combination with an emergency management protocol leads to a trend of reduced severity of ALF. High genetic impact on clinical phenotype in NBAS-associated disease facilitates monitoring and management of affected patients sharing the same genotype. Pre-symptomatic diagnosis and an emergency management protocol do not prevent ALF but may reduce its clinical severity.
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Affiliation(s)
- Nicole Hammann
- Heidelberg University, Medical Faculty Heidelberg, Center for Pediatric and Adolescent Medicine, Department I, Division of Pediatric Neurology and Metabolic Medicine, Heidelberg, Germany
| | - Dominic Lenz
- Heidelberg University, Medical Faculty Heidelberg, Center for Pediatric and Adolescent Medicine, Department I, Division of Pediatric Neurology and Metabolic Medicine, Heidelberg, Germany
| | - Ivo Baric
- Department of Paediatrics, University Hospital Center Zagreb, University of Zagreb, School of Medicine, Zagreb, Croatia
| | - Ellen Crushell
- National Centre for Inherited Metabolic Disorders, Childrens Health Ireland, Temple Street, Dublin 1, Ireland
| | - Carlo Dionisi Vici
- Division of Metabolism, Bambino Gesù Children's Research Hospital, Rome, Italy
| | - Felix Distelmaier
- Department of General Paediatrics, Neonatology and Paediatric Cardiology, University Children's Hospital, Heinrich-Heine-University, Düsseldorf, Germany
| | - Francois Feillet
- Department of Paediatrics, Hôpital d'Enfants Brabois, CHU Nancy, Vandoeuvre les Nancy, France
| | | | - Maja Hempel
- Institute of Human Genetics, Heidelberg University Hospital, Heidelberg, Germany
| | - Anna L Khoreva
- Dmitry Rogachev National Research Center for Pediatric Hematology, Oncology, Immunology Moscow, Russia
| | - Martin W Laass
- Department of Pediatrics, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Yves Lacassie
- Department of Pediatrics, Division of Genetics, LSU Health Sciences Center and Children's Hospital, New Orleans, Louisiana, USA
| | - Elke Lainka
- Pediatrics II, Department for Pediatric Nephrology, Gastroenterology, Endocrinology and Transplant Medicine, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Catherine Larson-Nath
- Pediatric Gastroenterology, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Zhongdie Li
- Center for Pediatric Liver Diseases, Children's Hospital of Fudan University, Shanghai, China
| | - Patryk Lipiński
- Department of Pediatrics, Nutrition and Metabolic Diseases, The Children's Memorial Health Institute, Warsaw, Poland
| | - Eberhard Lurz
- Department of Pediatrics, Dr. von Hauner Children's Hospital, University Hospital, LMU Munich, Munich, Germany
| | - André Mégarbané
- Department of Human Genetics Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Byblos, Lebanon; Institut Jérôme Lejeune, Paris, France
| | - Susana Nobre
- Pediatric Hepatology and Liver Transplantation Unit, Pediatric Department, Coimbra Hospital and Universitary Centre, Coimbra, Portugal
| | - Giorgia Olivieri
- Division of Metabolism, Bambino Gesù Children's Research Hospital, Rome, Italy
| | - Bianca Peters
- Heidelberg University, Medical Faculty Heidelberg, Center for Pediatric and Adolescent Medicine, Department I, Division of Pediatric Neurology and Metabolic Medicine, Heidelberg, Germany
| | - Paolo Prontera
- Medical Genetics Unit, Maternal-Infantile Department, Hospital and University of Perugia, Perugia, Italy
| | - Lea D Schlieben
- School of Medicine, Institute of Human Genetics, Technische Universität München, Munich, Germany; Department Computational Health, Institute of Neurogenomics, Helmholtz Zentrum München, Munich, Germany
| | - Christine M Seroogy
- Division of Allergy, Immunology and Rheumatology, Department of Pediatrics, University of Wisconsin-Madison, USA
| | - Cristina Sobacchi
- Humanitas Research Hospital IRCCS, Rozzano, Italy; Institute for Genetic and Biomedical Research-National Research Council, Milan Unit, Milan, Italy
| | - Shigeru Suzuki
- Department of Pediatrics, Asahikawa Medical University, Asahikawa, Japan
| | - Christel Tran
- Division of Genetic Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Jerry Vockley
- University of Pittsburgh School of Medicine, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA, USA
| | - Jian-She Wang
- Center for Pediatric Liver Diseases, Children's Hospital of Fudan University, Shanghai, China
| | - Matias Wagner
- School of Medicine, Institute of Human Genetics, Technische Universität München, Munich, Germany; Department Computational Health, Institute of Neurogenomics, Helmholtz Zentrum München, Munich, Germany
| | - Holger Prokisch
- School of Medicine, Institute of Human Genetics, Technische Universität München, Munich, Germany; Department Computational Health, Institute of Neurogenomics, Helmholtz Zentrum München, Munich, Germany
| | - Sven F Garbade
- Heidelberg University, Medical Faculty Heidelberg, Center for Pediatric and Adolescent Medicine, Department I, Division of Pediatric Neurology and Metabolic Medicine, Heidelberg, Germany
| | - Stefan Kölker
- Heidelberg University, Medical Faculty Heidelberg, Center for Pediatric and Adolescent Medicine, Department I, Division of Pediatric Neurology and Metabolic Medicine, Heidelberg, Germany
| | - Georg F Hoffmann
- Heidelberg University, Medical Faculty Heidelberg, Center for Pediatric and Adolescent Medicine, Department I, Division of Pediatric Neurology and Metabolic Medicine, Heidelberg, Germany
| | - Christian Staufner
- Heidelberg University, Medical Faculty Heidelberg, Center for Pediatric and Adolescent Medicine, Department I, Division of Pediatric Neurology and Metabolic Medicine, Heidelberg, Germany.
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2
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Bejaoui Y, Alresheq S, Durand S, Vilaire-Meunier M, Maillebouis L, Zen AAH, Mégarbané A, Hajj NE. DNA methylation profiling in Trisomy 21 females with and without breast cancer. Front Oncol 2023; 13:1203483. [PMID: 37538118 PMCID: PMC10395079 DOI: 10.3389/fonc.2023.1203483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 07/03/2023] [Indexed: 08/05/2023] Open
Abstract
Background Down Syndrome (DS) is the most common chromosome anomaly in humans and occurs due to an extra copy of chromosome 21. The malignancy profile in DS is unique, since DS patients have a low risk of developing solid tumors such as breast cancer however they are at higher risk of developing acute myeloid leukemia and acute lymphoblastic leukemia. Methods In this study, we investigated DNA methylation signatures and epigenetic aging in DS individuals with and without breast cancer. We analyzed DNA methylation patterns in Trisomy 21 (T21) individuals without breast cancer (T21-BCF) and DS individuals with breast cancer (T21-BC), using the Infinium Methylation EPIC BeadChip array. Results Our results revealed several differentially methylated sites and regions in the T21-BC patients that were associated with changes in gene expression. The differentially methylated CpG sites were enriched for processes related to serine-type peptidase activity, epithelial cell development, GTPase activity, bicellular tight junction, Ras protein signal transduction, etc. On the other hand, the epigenetic age acceleration analysis showed no difference between T21-BC and T21-BCF patients. Conclusions This is the first study to investigate DNA methylation changes in Down syndrome women with and without breast cancer and it could help shed light on factors that protect against breast cancer in DS.
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Affiliation(s)
- Yosra Bejaoui
- College of Health and Life Sciences, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Sara Alresheq
- College of Health and Life Sciences, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | | | | | | | - Ayman Al Haj Zen
- College of Health and Life Sciences, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - André Mégarbané
- Institut Jérôme Lejeune, Paris, France
- Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Byblos, Lebanon
| | - Nady El Hajj
- College of Health and Life Sciences, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
- College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
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Guo L, Salian S, Xue JY, Rath N, Rousseau J, Kim H, Ehresmann S, Moosa S, Nakagawa N, Kuroda H, Clayton-Smith J, Wang J, Wang Z, Banka S, Jackson A, Zhang YM, Wei ZJ, Hüning I, Brunet T, Ohashi H, Thomas MF, Bupp C, Miyake N, Matsumoto N, Mendoza-Londono R, Costain G, Hahn G, Di Donato N, Yigit G, Yamada T, Nishimura G, Ansel KM, Wollnik B, Hrabě de Angelis M, Mégarbané A, Rosenfeld JA, Heissmeyer V, Ikegawa S, Campeau PM. Null and missense mutations of ERI1 cause a recessive phenotypic dichotomy in humans. Am J Hum Genet 2023; 110:1068-1085. [PMID: 37352860 PMCID: PMC10357479 DOI: 10.1016/j.ajhg.2023.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 05/31/2023] [Accepted: 06/01/2023] [Indexed: 06/25/2023] Open
Abstract
ERI1 is a 3'-to-5' exoribonuclease involved in RNA metabolic pathways including 5.8S rRNA processing and turnover of histone mRNAs. Its biological and medical significance remain unclear. Here, we uncover a phenotypic dichotomy associated with bi-allelic ERI1 variants by reporting eight affected individuals from seven unrelated families. A severe spondyloepimetaphyseal dysplasia (SEMD) was identified in five affected individuals with missense variants but not in those with bi-allelic null variants, who showed mild intellectual disability and digital anomalies. The ERI1 missense variants cause a loss of the exoribonuclease activity, leading to defective trimming of the 5.8S rRNA 3' end and a decreased degradation of replication-dependent histone mRNAs. Affected-individual-derived induced pluripotent stem cells (iPSCs) showed impaired in vitro chondrogenesis with downregulation of genes regulating skeletal patterning. Our study establishes an entity previously unreported in OMIM and provides a model showing a more severe effect of missense alleles than null alleles within recessive genotypes, suggesting a key role of ERI1-mediated RNA metabolism in human skeletal patterning and chondrogenesis.
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Affiliation(s)
- Long Guo
- Department of Laboratory Animal Science, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an 710061, China; National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China; Center of Medical Genetics, Northwest Women's and Children's Hospital, the Affiliated Northwest Women's and Children's Hospital of Xi'an Jiaotong University Health Science Center, Xi'an 710003, China.
| | - Smrithi Salian
- Department of Pediatrics, CHU Sainte Justine Research Center, University of Montreal, 3175 Cote-Sainte-Catherine, Montreal, QC H3T 1C5, Canada
| | - Jing-Yi Xue
- Department of Laboratory Animal Science, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an 710061, China; Laboratory for Bone and Joint Diseases, RIKEN Center for Integrative Medical Sciences, Tokyo 108-8639, Japan
| | - Nicola Rath
- Research Unit Molecular Immune Regulation, Helmholtz Zentrum München, German Research Center for Environmental Health, D-81377 Munich, Germany
| | - Justine Rousseau
- Department of Pediatrics, CHU Sainte Justine Research Center, University of Montreal, 3175 Cote-Sainte-Catherine, Montreal, QC H3T 1C5, Canada
| | - Hyunyun Kim
- Department of Pediatrics, CHU Sainte Justine Research Center, University of Montreal, 3175 Cote-Sainte-Catherine, Montreal, QC H3T 1C5, Canada
| | - Sophie Ehresmann
- Molecular Biology Program, Université de Montréal, Montréal, QC H3T 1J4, Canada
| | - Shahida Moosa
- Division of Molecular Biology and Human Genetics, Stellenbosch University and Medical Genetics, Tygerberg Hospital, Tygerberg 7505, South Africa
| | - Norio Nakagawa
- Department of Pediatrics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; Department of Pediatrics, North Medical Center, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan
| | - Hiroshi Kuroda
- Department of Pediatrics, Kyoto City Hospital, Kyoto 604-8845, Japan
| | - Jill Clayton-Smith
- Manchester Centre for Genomic Medicine, St Mary's Hospital, Manchester University Foundation NHS Trust, Health Innovation Manchester, M13 9WL Manchester, UK; Division of Evolution and Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, M13 9PL Manchester, UK
| | - Juan Wang
- Department of Ultrasound, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China
| | - Zheng Wang
- Laboratory for Bone and Joint Diseases, RIKEN Center for Integrative Medical Sciences, Tokyo 108-8639, Japan
| | - Siddharth Banka
- Manchester Centre for Genomic Medicine, St Mary's Hospital, Manchester University Foundation NHS Trust, Health Innovation Manchester, M13 9WL Manchester, UK; Division of Evolution and Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, M13 9PL Manchester, UK
| | - Adam Jackson
- Manchester Centre for Genomic Medicine, St Mary's Hospital, Manchester University Foundation NHS Trust, Health Innovation Manchester, M13 9WL Manchester, UK; Division of Evolution and Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, M13 9PL Manchester, UK
| | - Yan-Min Zhang
- Shaanxi Institute for Pediatric Diseases, Xi'an Children's Hospital, Affiliated Children's Hospital of Xi'an Jiaotong University, Xi'an 710082, China
| | - Zhen-Jie Wei
- Laboratory for Bone and Joint Diseases, RIKEN Center for Integrative Medical Sciences, Tokyo 108-8639, Japan
| | - Irina Hüning
- Institute of Human Genetics, University of Lübeck, 23538 Lübeck, Germany
| | - Theresa Brunet
- Institute of Human Genetics, School of Medicine, Technical University Munich, 80333 Munich, Germany; Department of Paediatric Neurology and Developmental Medicine, Hauner Children's Hospital, Ludwig Maximilian University of Munich, 80539 Munich, Germany
| | - Hirofumi Ohashi
- Division of Medical Genetics, Saitama Children's Hospital, Saitama 330-8777, Japan
| | - Molly F Thomas
- Division of Gastroenterology, Department of Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Caleb Bupp
- Spectrum Health, Grand Rapids, MI 49503, USA
| | - Noriko Miyake
- Department of Human Genetics, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan
| | - Naomichi Matsumoto
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan
| | - Roberto Mendoza-Londono
- Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, Program in Genetics and Genome Biology, SickKids Research Institute, and Department of Paediatrics, University of Toronto, Toronto, ON M5G 1X8, Canada
| | - Gregory Costain
- Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A4, Canada
| | - Gabriele Hahn
- Institute for Radiological Diagnostics, Universitätsklinikum Carl Gustav Carus Dresden, Technische Universität, 01307 Dresden, Germany
| | - Nataliya Di Donato
- Institute for Clinical Genetics, University Hospital, TU Dresden, 01069 Dresden, Germany
| | - Gökhan Yigit
- Institute of Human Genetics, University Medical Center Göttingen, 37075 Göttingen, Germany; DZHK (German Center for Cardiovascular Research), partner site Göttingen, 37075 Göttingen, Germany
| | - Takahiro Yamada
- Department of Medical Ethics and Medical Genetics, Kyoto University School of Public Health, Kyoto 606-8501, Japan
| | - Gen Nishimura
- Laboratory for Bone and Joint Diseases, RIKEN Center for Integrative Medical Sciences, Tokyo 108-8639, Japan
| | - K Mark Ansel
- Department of Microbiology and Immunology, University of California San Francisco, San Francisco, CA 94143, USA
| | - Bernd Wollnik
- Institute of Human Genetics, University Medical Center Göttingen, 37075 Göttingen, Germany; DZHK (German Center for Cardiovascular Research), partner site Göttingen, 37075 Göttingen, Germany; Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, 37075 Göttingen, Germany
| | - Martin Hrabě de Angelis
- Institute of Experimental Genetics, German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), 85764 Neuherberg, Germany; Chair of Experimental Genetics, TUM School of Life Sciences, Technische Universität München, 85354 Freising, Germany; German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
| | - André Mégarbané
- Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, 1102-2801, Lebanon and Institut Jerome Lejeune, 75015 Paris, France
| | - Jill A Rosenfeld
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Baylor Genetics Laboratories, Houston, TX 77021, USA
| | - Vigo Heissmeyer
- Research Unit Molecular Immune Regulation, Helmholtz Zentrum München, German Research Center for Environmental Health, D-81377 Munich, Germany; Institute for Immunology, Biomedical Center, Faculty of Medicine, Ludwig-Maximilians-Universität in Munich, 82152 Planegg-Martinsried, Germany
| | - Shiro Ikegawa
- Laboratory for Bone and Joint Diseases, RIKEN Center for Integrative Medical Sciences, Tokyo 108-8639, Japan
| | - Philippe M Campeau
- Department of Pediatrics, CHU Sainte Justine Research Center, University of Montreal, 3175 Cote-Sainte-Catherine, Montreal, QC H3T 1C5, Canada.
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4
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El-Bazzal L, Ghata A, Estève C, Gadacha J, Quintana P, Castro C, Roeckel-Trévisiol N, Lembo F, Lenfant N, Mégarbané A, Borg JP, Lévy N, Bartoli M, Poitelon Y, Roubertoux PL, Delague V, Bernard-Marissal N. Imbalance of NRG1-ERBB2/3 signalling underlies altered myelination in Charcot-Marie-Tooth disease 4H. Brain 2023; 146:1844-1858. [PMID: 36314052 PMCID: PMC10151191 DOI: 10.1093/brain/awac402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 08/30/2022] [Accepted: 10/02/2022] [Indexed: 11/12/2022] Open
Abstract
Charcot-Marie-Tooth (CMT) disease is one of the most common inherited neurological disorders, affecting either axons from the motor and/or sensory neurons or Schwann cells of the peripheral nervous system (PNS) and caused by more than 100 genes. We previously identified mutations in FGD4 as responsible for CMT4H, an autosomal recessive demyelinating form of CMT disease. FGD4 encodes FRABIN, a GDP/GTP nucleotide exchange factor, particularly for the small GTPase Cdc42. Remarkably, nerves from patients with CMT4H display excessive redundant myelin figures called outfoldings that arise from focal hypermyelination, suggesting that FRABIN could play a role in the control of PNS myelination. To gain insights into the role of FGD4/FRABIN in Schwann cell myelination, we generated a knockout mouse model (Fgd4SC-/-), with conditional ablation of Fgd4 in Schwann cells. We show that the specific deletion of FRABIN in Schwann cells leads to aberrant myelination in vitro, in dorsal root ganglia neuron/Schwann cell co-cultures, as well as in vivo, in distal sciatic nerves from Fgd4SC-/- mice. We observed that those myelination defects are related to an upregulation of some interactors of the NRG1 type III/ERBB2/3 signalling pathway, which is known to ensure a proper level of myelination in the PNS. Based on a yeast two-hybrid screen, we identified SNX3 as a new partner of FRABIN, which is involved in the regulation of endocytic trafficking. Interestingly, we showed that the loss of FRABIN impairs endocytic trafficking, which may contribute to the defective NRG1 type III/ERBB2/3 signalling and myelination. Using RNA-Seq, in vitro, we identified new potential effectors of the deregulated pathways, such as ERBIN, RAB11FIP2 and MAF, thereby providing cues to understand how FRABIN contributes to proper ERBB2 trafficking or even myelin membrane addition through cholesterol synthesis. Finally, we showed that the re-establishment of proper levels of the NRG1 type III/ERBB2/3 pathway using niacin treatment reduces myelin outfoldings in nerves of CMT4H mice. Overall, our work reveals a new role of FRABIN in the regulation of NRG1 type III/ERBB2/3 NRG1signalling and myelination and opens future therapeutic strategies based on the modulation of the NRG1 type III/ERBB2/3 pathway to reduce CMT4H pathology and more generally other demyelinating types of CMT disease.
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Affiliation(s)
- Lara El-Bazzal
- Aix Marseille Univ, INSERM, MMG, U 1251, Marseille, France
| | - Adeline Ghata
- Aix Marseille Univ, INSERM, MMG, U 1251, Marseille, France
| | | | - Jihane Gadacha
- Aix Marseille Univ, INSERM, MMG, U 1251, Marseille, France
| | | | | | | | - Frédérique Lembo
- Aix Marseille Univ, INSERM, CNRS, CRCM, Institut Paoli-Calmettes, Marseille, France
| | | | - André Mégarbané
- Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Beirut, Lebanon
| | - Jean-Paul Borg
- Aix Marseille Univ, INSERM, CNRS, CRCM, Institut Paoli-Calmettes, Marseille, France
| | - Nicolas Lévy
- Aix Marseille Univ, INSERM, MMG, U 1251, Marseille, France
| | - Marc Bartoli
- Aix Marseille Univ, INSERM, MMG, U 1251, Marseille, France
| | - Yannick Poitelon
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, NY, USA
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5
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Bos R, Rihan K, Quintana P, El-Bazzal L, Bernard-Marissal N, Da Silva N, Jabbour R, Mégarbané A, Bartoli M, Brocard F, Delague V. Altered action potential waveform and shorter axonal initial segment in hiPSC-derived motor neurons with mutations in VRK1. Neurobiol Dis 2022; 164:105609. [PMID: 34990802 DOI: 10.1016/j.nbd.2021.105609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 10/24/2021] [Accepted: 12/30/2021] [Indexed: 11/25/2022] Open
Abstract
We recently described new pathogenic variants in VRK1, in patients affected with distal Hereditary Motor Neuropathy associated with upper motor neurons signs. Specifically, we provided evidences that hiPSC-derived Motor Neurons (hiPSC-MN) from these patients display Cajal Bodies (CBs) disassembly and defects in neurite outgrowth and branching. We here focused on the Axonal Initial Segment (AIS) and the related firing properties of hiPSC-MNs from these patients. We found that the patient's Action Potential (AP) was smaller in amplitude, larger in duration, and displayed a more depolarized threshold while the firing patterns were not altered. These alterations were accompanied by a decrease in the AIS length measured in patients' hiPSC-MNs. These data indicate that mutations in VRK1 impact the AP waveform and the AIS organization in MNs and may ultimately lead to the related motor neuron disease.
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Affiliation(s)
- Rémi Bos
- Aix Marseille Univ, CNRS, Institut de Neurosciences de la Timone (INT), UMR 7289, Marseille, France.
| | - Khalil Rihan
- Aix Marseille Univ, Inserm, MMG, U 1251, Institut Marseille Maladies Rares (MarMaRa), Marseille, France
| | - Patrice Quintana
- Aix Marseille Univ, Inserm, MMG, U 1251, Institut Marseille Maladies Rares (MarMaRa), Marseille, France
| | - Lara El-Bazzal
- Aix Marseille Univ, Inserm, MMG, U 1251, Institut Marseille Maladies Rares (MarMaRa), Marseille, France
| | - Nathalie Bernard-Marissal
- Aix Marseille Univ, Inserm, MMG, U 1251, Institut Marseille Maladies Rares (MarMaRa), Marseille, France
| | - Nathalie Da Silva
- Aix Marseille Univ, Inserm, MMG, U 1251, Institut Marseille Maladies Rares (MarMaRa), Marseille, France
| | - Rosette Jabbour
- Neurology Division, Department of Internal Medicine, St George Hospital University Medical Center, University of Balamand, Beirut, Lebanon
| | - André Mégarbané
- Department of Human Genetics, Gilbert and RoseMary Chagoury Hospital, Lebanese American University, Byblos, Lebanon
| | - Marc Bartoli
- Aix Marseille Univ, Inserm, MMG, U 1251, Institut Marseille Maladies Rares (MarMaRa), Marseille, France
| | - Frédéric Brocard
- Aix Marseille Univ, CNRS, Institut de Neurosciences de la Timone (INT), UMR 7289, Marseille, France
| | - Valérie Delague
- Aix Marseille Univ, Inserm, MMG, U 1251, Institut Marseille Maladies Rares (MarMaRa), Marseille, France.
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Mégarbané A, Hana S, Mégarbané H, Castro C, Baulande S, Criqui A, Roëckel-Trevisiol N, Dagher C, Al-Ali MT, Desvignes JP, Mahfoud D, El-Hayek S, Delague V. Clinical and Molecular Update on the Fourth Reported Family with Hamamy Syndrome. Mol Syndromol 2021; 12:342-350. [PMID: 34899143 DOI: 10.1159/000517253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 05/18/2021] [Indexed: 11/19/2022] Open
Abstract
We report on 2 cousins, a girl and a boy, born to first-cousin Lebanese parents with Hamamy syndrome, exhibiting developmental delay, intellectual disability, severe telecanthus, abnormal ears, dentinogenesis imperfecta, and bone fragility. Whole-exome sequencing studies performed on the 2 affected individuals and one obligate carrier revealed the presence of a homozygous c.503G>A (p.Arg168His) missense mutation in IRX5 in both sibs, not reported in any other family. Review of the literature and differential diagnoses are discussed.
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Affiliation(s)
- André Mégarbané
- Department of Human Genetics, Gilbert and Rose-Marie Ghagoury School of Medicine, Lebanese American University, Byblos, Lebanon.,Institut Jérôme Lejeune, Paris, France
| | - Sayeeda Hana
- Centre for Arab Genomic Studies, Dubai, United Arab Emirates
| | - Hala Mégarbané
- Department of Dermatology, Balamand University, Saint George Hospital, Beirut, Lebanon
| | | | | | | | | | - Christel Dagher
- Department of Human Genetics, Gilbert and Rose-Marie Ghagoury School of Medicine, Lebanese American University, Byblos, Lebanon
| | | | | | - Daniel Mahfoud
- Department of Radiology, Gilbert and Rose-Marie Ghagoury School of Medicine, Lebanese American University, Byblos, Lebanon
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7
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Roche M, Mircher C, Toulas J, Prioux E, Conte M, Ravel A, Falquero S, Labidi A, Stora S, Durand S, Mégarbané A, Cieuta-Walti C. Efficacy and safety of methylphenidate on attention deficit hyperactivity disorder in children with Down syndrome. J Intellect Disabil Res 2021; 65:795-800. [PMID: 33880800 DOI: 10.1111/jir.12832] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 02/14/2021] [Accepted: 02/21/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Attention deficit hyperactivity disorder (ADHD) is a common co-morbidity that affects up to 44% of children with Down syndrome (DS). There is a need for reliable, good quality research on the use of methylphenidate within this population. The objective of this study is to report our experience regarding the management of ADHD in these children using methylphenidate. METHODS This study is a retrospective observation of 21 children with DS, followed at Jérôme Lejeune Institute between 2000 and 2018. The diagnosis of ADHD was made using the Diagnostic and Statistical Manual of Mental Disorders criteria. Efficacy was measured as response or non-response on two main symptoms: attention/concentration and hyperactivity/impulsivity. Safety was evaluated by the presence or absence of side effects. RESULTS Sixteen out of the 21 children (76%) showed improvement with methylphenidate. The average age of treatment onset in responding children was 8 years and 10 months versus 6 years and 3 months in non-responders (P = 0.05). Average dose/weight was significantly different in responders and non-responders (0.82 vs. 0.54 mg/kg/day, respectively; P = 0.03). Twelve children out of 21 (57%) experienced side effects; only three experienced side effects severe enough to require treatment interruption. Most common side effects were loss of appetite and difficulties in falling asleep. CONCLUSION Methylphenidate was effective and safe in treating ADHD in 76% of cases in children with DS, with few serious side effects to report. Early diagnosis of ADHD is important to improve the quality of life, learning, inclusion and socialisation of children with DS.
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Affiliation(s)
- M Roche
- CRB BioJeL, Institut Jérôme Lejeune, Paris, France
| | - C Mircher
- CRB BioJeL, Institut Jérôme Lejeune, Paris, France
| | - J Toulas
- CRB BioJeL, Institut Jérôme Lejeune, Paris, France
| | - E Prioux
- CRB BioJeL, Institut Jérôme Lejeune, Paris, France
| | - M Conte
- CRB BioJeL, Institut Jérôme Lejeune, Paris, France
| | - A Ravel
- CRB BioJeL, Institut Jérôme Lejeune, Paris, France
| | - S Falquero
- CRB BioJeL, Institut Jérôme Lejeune, Paris, France
| | - A Labidi
- CRB BioJeL, Institut Jérôme Lejeune, Paris, France
| | - S Stora
- CRB BioJeL, Institut Jérôme Lejeune, Paris, France
| | - S Durand
- CRB BioJeL, Institut Jérôme Lejeune, Paris, France
| | - A Mégarbané
- CRB BioJeL, Institut Jérôme Lejeune, Paris, France
- Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Byblos, Lebanon
| | - C Cieuta-Walti
- CRB BioJeL, Institut Jérôme Lejeune, Paris, France
- Department of Pediatric Neurology, Sherbrooke Medical University, Sherbrooke, Quebec, Canada
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8
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Laquerriere A, Jaber D, Abiusi E, Maluenda J, Mejlachowicz D, Vivanti A, Dieterich K, Stoeva R, Quevarec L, Nolent F, Biancalana V, Latour P, Sternberg D, Capri Y, Verloes A, Bessieres B, Loeuillet L, Attie-Bitach T, Martinovic J, Blesson S, Petit F, Beneteau C, Whalen S, Marguet F, Bouligand J, Héron D, Viot G, Amiel J, Amram D, Bellesme C, Bucourt M, Faivre L, Jouk PS, Khung S, Sigaudy S, Delezoide AL, Goldenberg A, Jacquemont ML, Lambert L, Layet V, Lyonnet S, Munnich A, Van Maldergem L, Piard J, Guimiot F, Landrieu P, Letard P, Pelluard F, Perrin L, Saint-Frison MH, Topaloglu H, Trestard L, Vincent-Delorme C, Amthor H, Barnerias C, Benachi A, Bieth E, Boucher E, Cormier-Daire V, Delahaye-Duriez A, Desguerre I, Eymard B, Francannet C, Grotto S, Lacombe D, Laffargue F, Legendre M, Martin-Coignard D, Mégarbané A, Mercier S, Nizon M, Rigonnot L, Prieur F, Quélin C, Ranjatoelina-Randrianaivo H, Resta N, Toutain A, Verhelst H, Vincent M, Colin E, Fallet-Bianco C, Granier M, Grigorescu R, Saada J, Gonzales M, Guiochon-Mantel A, Bessereau JL, Tawk M, Gut I, Gitiaux C, Melki J. Phenotypic spectrum and genomics of undiagnosed arthrogryposis multiplex congenita. J Med Genet 2021; 59:559-567. [PMID: 33820833 PMCID: PMC9132874 DOI: 10.1136/jmedgenet-2020-107595] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 02/23/2021] [Accepted: 03/14/2021] [Indexed: 12/16/2022]
Abstract
BACKGROUND Arthrogryposis multiplex congenita (AMC) is characterised by congenital joint contractures in two or more body areas. AMC exhibits wide phenotypic and genetic heterogeneity. Our goals were to improve the genetic diagnosis rates of AMC, to evaluate the added value of whole exome sequencing (WES) compared with targeted exome sequencing (TES) and to identify new genes in 315 unrelated undiagnosed AMC families. METHODS Several genomic approaches were used including genetic mapping of disease loci in multiplex or consanguineous families, TES then WES. Sanger sequencing was performed to identify or validate variants. RESULTS We achieved disease gene identification in 52.7% of AMC index patients including nine recently identified genes (CNTNAP1, MAGEL2, ADGRG6, ADCY6, GLDN, LGI4, LMOD3, UNC50 and SCN1A). Moreover, we identified pathogenic variants in ASXL3 and STAC3 expanding the phenotypes associated with these genes. The most frequent cause of AMC was a primary involvement of skeletal muscle (40%) followed by brain (22%). The most frequent mode of inheritance is autosomal recessive (66.3% of patients). In sporadic patients born to non-consanguineous parents (n=60), de novo dominant autosomal or X linked variants were observed in 30 of them (50%). CONCLUSION New genes recently identified in AMC represent 21% of causing genes in our cohort. A high proportion of de novo variants were observed indicating that this mechanism plays a prominent part in this developmental disease. Our data showed the added value of WES when compared with TES due to the larger clinical spectrum of some disease genes than initially described and the identification of novel genes.
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Affiliation(s)
- Annie Laquerriere
- Normandie Univ, UNIROUEN, INSERM U1245; Rouen University Hospital, Department of Pathology, Normandy Centre for Genomic and Personalized Medicine, Rouen, France
| | - Dana Jaber
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR-1195, Université Paris Saclay, Le Kremlin-Bicetre, France
| | - Emanuela Abiusi
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR-1195, Université Paris Saclay, Le Kremlin-Bicetre, France.,Fondazione Policlinico Universitario A. Gemelli Istituto di Ricovero e Cura a Carattere Scientifico and Sezione di Medicina Genomica, Dipartimento di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Jérome Maluenda
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR-1195, Université Paris Saclay, Le Kremlin-Bicetre, France
| | - Dan Mejlachowicz
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR-1195, Université Paris Saclay, Le Kremlin-Bicetre, France
| | - Alexandre Vivanti
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR-1195, Université Paris Saclay, Le Kremlin-Bicetre, France
| | - Klaus Dieterich
- Univ. Grenoble Alpes, Inserm, U1209, CHU Grenoble Alpes, Grenoble, France
| | - Radka Stoeva
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR-1195, Université Paris Saclay, Le Kremlin-Bicetre, France.,Department of Medical Genetics, Le Mans Hospital, Le Mans, France
| | - Loic Quevarec
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR-1195, Université Paris Saclay, Le Kremlin-Bicetre, France
| | - Flora Nolent
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR-1195, Université Paris Saclay, Le Kremlin-Bicetre, France
| | - Valerie Biancalana
- Laboratoire Diagnostic Génétique, CHRU, Strasbourg; Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Fédération de Médecine Translationnelle de Strasbourg, Université de Strasbourg, Illkirch, France
| | - Philippe Latour
- Centre de Biologie Est, Hospices Civils de Lyon, Bron, France
| | - Damien Sternberg
- Service de Biochimie Métabolique et Centre de Génétique, APHP. Sorbonne Université, GH Pitié-Salpêtrière; Centre of Research in Myology, Sorbonne University, UMRS 974, Paris, France
| | - Yline Capri
- Département de Génétique, Assistance publique-Hopitaux de Paris (AP-HP), Hopital Robert Debré, Paris, France
| | - Alain Verloes
- Département de Génétique, Assistance publique-Hopitaux de Paris (AP-HP), Hopital Robert Debré, Paris, France
| | - Bettina Bessieres
- Unité d'Embryofoetopathologie, Service d'Histologie-Embryologie-Cytogénétique, Hôpital Necker-Enfants Malades, APHP, Paris, France
| | - Laurence Loeuillet
- Unité d'Embryofoetopathologie, Service d'Histologie-Embryologie-Cytogénétique, Hôpital Necker-Enfants Malades, APHP, Paris, France
| | - Tania Attie-Bitach
- Unité d'Embryofoetopathologie, Service d'Histologie-Embryologie-Cytogénétique, Hôpital Necker-Enfants Malades, APHP, Paris, France
| | - Jelena Martinovic
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR-1195, Université Paris Saclay, Le Kremlin-Bicetre, France.,Unité d'Embryofoetopathologie, Hôpital Antoine Béclère, APHP, Clamart, France
| | - Sophie Blesson
- Service de Génétique, Unité de Génétique Clinique, CHRU de Tours, Hôpital Bretonneau, Tours, France
| | - Florence Petit
- Service de Génétique Clinique Guy Fontaine, CHU Lille, Lille, France
| | - Claire Beneteau
- Service de Génétique Médicale, Centre Hospitalier Universitaire de Nantes; Institut du Thorax, INSERM, CNRS, Université de Nantes, Nantes, France
| | - Sandra Whalen
- UF de Génétique clinique et Centre de Référence Maladies Rares des Anomalies du Développement et Syndromes Malformatifs, APHP. Sorbonne Université, Hôpital Armand Trousseau, Paris, France
| | - Florent Marguet
- Normandie Univ, UNIROUEN, INSERM U1245; Rouen University Hospital, Department of Pathology, Normandy Centre for Genomic and Personalized Medicine, Rouen, France
| | - Jerome Bouligand
- Laboratoire de Génétique moléculaire, Pharmacogénétique et Hormonologie, Hôpital Bicêtre, APHP Université Paris Saclay, Le Kremlin-Bicêtre; Inserm UMR_S 1185, Faculté de médecine Paris Saclay, Université Paris Saclay, Le Kremlin-Bicêtre, France
| | - Delphine Héron
- Département de Génétique, APHP Sorbonne Université, Hôpital Pitié-Salpêtrière et Trousseau, PARIS, France
| | - Géraldine Viot
- Unité de Génétique, Clinique de la Muette, Paris, France
| | - Jeanne Amiel
- Service de Génétique Clinique, Centre de référence pour les maladies osseuses constitutionnelles APHP, Hôpital Necker-Enfants Malades; Université de Paris, UMR1163, INSERM, Institut Imagine, Paris, France
| | - Daniel Amram
- Unité de Génétique Clinique, Centre Hospitalier Intercommunal de Créteil, Créteil, France
| | - Céline Bellesme
- Department of Pediatric Neurology, APHP-Bicêtre Hospital, Le Kremlin-Bicêtre, France
| | - Martine Bucourt
- Service d'Histologie, Embryologie, et Cytogénétique, Hôpital Jean Verdier, APHP, Bondy, France
| | - Laurence Faivre
- Centre de Génétique et Centre de référence Anomalies du Développement et Syndromes Malformatifs, FHU TRANSLAD, Hôpital d'Enfants, CHU Dijon; UMR-Inserm 1231 GAD team, Génétique des Anomalies du développement, Université de Bourgogne Franche-Comté, Dijon, France
| | - Pierre-Simon Jouk
- Univ. Grenoble Alpes, Inserm, U1209, CHU Grenoble Alpes, Grenoble, France
| | - Suonavy Khung
- Unité Fonctionnelle de Fœtopathologie, Hôpital Universitaire Robert Debré; Inserm UMR 1141, Paris, France
| | - Sabine Sigaudy
- Département de Génétique Médicale, Hôpital Timone Enfant, Marseille, France
| | - Anne-Lise Delezoide
- Unité Fonctionnelle de Fœtopathologie, Hôpital Universitaire Robert Debré; Inserm UMR 1141, Paris, France
| | - Alice Goldenberg
- Department of Genetics and Reference Center for Developmental Disorders, Normandy Center for Genomic and Personalized Medicine, Normandie Univ, UNIROUEN, Inserm U1245 and Rouen University Hospital, Rouen, France
| | - Marie-Line Jacquemont
- UF de Génétique Médicale, CHU la Réunion, site GHSR, Ile de La Réunion, Saint-Pierre, France
| | | | - Valérie Layet
- Consultations de Génétique, Groupe Hospitalier du Havre, Le Havre, France
| | - Stanislas Lyonnet
- Imagine Institute, INSERM UMR 1163, Université de Paris; Fédération de Génétique Médicale, Assistance Publique-Hôpitaux de Paris, Hôpital Necker-Enfants Malades, Paris, France
| | - Arnold Munnich
- Imagine Institute, INSERM UMR 1163, Université de Paris; Fédération de Génétique Médicale, Assistance Publique-Hôpitaux de Paris, Hôpital Necker-Enfants Malades, Paris, France
| | | | - Juliette Piard
- Centre de Génétique Humaine, Université de Franche-Comté, Besançon, France
| | - Fabien Guimiot
- Unité Fonctionnelle de Fœtopathologie, Hôpital Universitaire Robert Debré; Inserm UMR 1141, Paris, France
| | - Pierre Landrieu
- Department of Pediatric Neurology, APHP-Bicêtre Hospital, Le Kremlin-Bicêtre, France
| | - Pascaline Letard
- Service d'Histologie, Embryologie, et Cytogénétique, Hôpital Jean Verdier, APHP, Bondy, France
| | - Fanny Pelluard
- UMR U1053, INSERM et Université de Bordeaux; Unité de fœtopathologie, Service de pathologie, CHU de Bordeaux, Bordeaux, France
| | - Laurence Perrin
- Département de Génétique, Assistance publique-Hopitaux de Paris (AP-HP), Hopital Robert Debré, Paris, France
| | - Marie-Hélène Saint-Frison
- Unité Fonctionnelle de Fœtopathologie, Hôpital Universitaire Robert Debré; Inserm UMR 1141, Paris, France
| | - Haluk Topaloglu
- Yeditepe University Deparment of Pediatrics, Istanbul, Turkey
| | | | | | - Helge Amthor
- Neuromuscular Reference Centre, Pediatric Department, University Hospital Raymond Poincaré, Garches, France
| | - Christine Barnerias
- Service de Neuropédiatrie, CR Neuromusculaire Necker, Hôpital Necker- Enfants Malades, Paris, France
| | - Alexandra Benachi
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR-1195, Université Paris Saclay, Le Kremlin-Bicetre, France.,Service de Gynécologie-Obstétrique, Hôpital Antoine Béclère, AP-HP, Clamart, France
| | - Eric Bieth
- Service de Génétique Médicale, Hopital Purpan, Toulouse, France
| | - Elise Boucher
- Centre de Génétique Humaine, Université de Franche-Comté, Besançon, France
| | - Valerie Cormier-Daire
- Service de Génétique Clinique, Centre de référence pour les maladies osseuses constitutionnelles APHP, Hôpital Necker-Enfants Malades; Université de Paris, UMR1163, INSERM, Institut Imagine, Paris, France
| | - Andrée Delahaye-Duriez
- Service d'Histologie, Embryologie, et Cytogénétique, Hôpital Jean Verdier, APHP, Bondy, France.,Université de Paris, NeuroDiderot, Inserm, Paris, France
| | - Isabelle Desguerre
- Service de Neuropédiatrie, CR Neuromusculaire Necker, Hôpital Necker- Enfants Malades, Paris, France
| | - Bruno Eymard
- Sorbonne Université, GH Pitié-Salpêtrière, Paris, France
| | - Christine Francannet
- Service de génétique médicale et centre de référence des anomalies du développement et des déficits intellectuels rares, CHU de Clermont-Ferrand, Clermont-Ferrand, France
| | - Sarah Grotto
- Maternité Port-Royal, AP-HP, Hôpital Cochin, Paris, France
| | - Didier Lacombe
- Service de Génétique Médicale, CHU Bordeaux, Hopital Pellegrin, Bordeaux, France
| | - Fanny Laffargue
- Service de génétique médicale et centre de référence des anomalies du développement et des déficits intellectuels rares, CHU de Clermont-Ferrand, Clermont-Ferrand, France
| | - Marine Legendre
- Service de Génétique Médicale, CHU Bordeaux, Hopital Pellegrin, Bordeaux, France
| | | | - André Mégarbané
- Department of Human Genetics, Gilbert and Rose-Marie Ghagoury School of Medicine, Lebanese American University, Byblos, Lebanon
| | - Sandra Mercier
- Service de Génétique Médicale, Centre Hospitalier Universitaire de Nantes; Institut du Thorax, INSERM, CNRS, Université de Nantes, Nantes, France
| | - Mathilde Nizon
- Service de Génétique Médicale, Centre Hospitalier Universitaire de Nantes; Institut du Thorax, INSERM, CNRS, Université de Nantes, Nantes, France
| | - Luc Rigonnot
- Service de gynécologie obstétrique, Centre Hospitalier Sud Francilien, Corbeil Essonnes, France
| | - Fabienne Prieur
- Service de Génétique Clinique, CHU de Saint Etienne, Saint-Etienne, France
| | - Chloé Quélin
- Service de Génétique Clinique, CLAD Ouest, CHU Rennes, F-35033 RENNES, France
| | | | - Nicoletta Resta
- Department of Biomedical Sciences and Human Oncology (DIMO), Medical Genetics, University of Bari "Aldo Moro", Bari, Italy
| | - Annick Toutain
- Service de Génétique, Centre Hospitalier Universitaire de Tours; UMR 1253, iBrain, Université de Tours, Inserm, Tours, France
| | - Helene Verhelst
- Department of Pediatrics, Division of Pediatric Neurology, Ghent University Hospital, Ghent, Belgium
| | - Marie Vincent
- Service de Génétique Médicale, Centre Hospitalier Universitaire de Nantes; Institut du Thorax, INSERM, CNRS, Université de Nantes, Nantes, France
| | - Estelle Colin
- Service de Génétique Médicale, CHU d'Angers, Angers, France
| | | | - Michèle Granier
- Neonatology and Neonatal Intensive Care Unit, Centre Hospitalier Sud Francilien, Corbeil Essonnes, France
| | - Romulus Grigorescu
- Unité de Génétique du Développement fœtal, Département de Génétique et Embryologie médicales, CHU Paris Est, Hôpital d'Enfants Armand-Trousseau, Paris, France
| | - Julien Saada
- Service de Gynécologie-Obstétrique, Hôpital Antoine Béclère, AP-HP, Clamart, France
| | - Marie Gonzales
- Unité d'Embryofoetopathologie, Service d'Histologie-Embryologie-Cytogénétique, Hôpital Necker-Enfants Malades, APHP, Paris, France
| | - Anne Guiochon-Mantel
- Laboratoire de Génétique moléculaire, Pharmacogénétique et Hormonologie, Hôpital Bicêtre, APHP Université Paris Saclay, Le Kremlin-Bicêtre; Inserm UMR_S 1185, Faculté de médecine Paris Saclay, Université Paris Saclay, Le Kremlin-Bicêtre, France
| | - Jean-Louis Bessereau
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5310, INSERM U 1217, Institut NeuroMyoGène, Lyon, France
| | - Marcel Tawk
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR-1195, Université Paris Saclay, Le Kremlin-Bicetre, France
| | - Ivo Gut
- CNAG-CRG, Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology (BIST); Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Cyril Gitiaux
- Unité de Neurophysiologie Clinique, Centre de référence des maladies neuromusculaires, Hôpital Necker Enfants Malades, APHP, Université de Paris, Paris, France
| | - Judith Melki
- Institut National de la Santé et de la Recherche Médicale (Inserm), UMR-1195, Université Paris Saclay, Le Kremlin-Bicetre, France .,Unité de Génétique Médicale, Centre de référence des anomalies du développement et syndromes malformatifs d'Île-de-France, APHP, Le Kremlin Bicêtre, France
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Alghamdi F, Al-Tawari A, Alrohaif H, Alshuaibi W, Mansour H, Aartsma-Rus A, Mégarbané A. Case Report: The Genetic Diagnosis of Duchenne Muscular Dystrophy in the Middle East. Front Pediatr 2021; 9:716424. [PMID: 34595143 PMCID: PMC8476401 DOI: 10.3389/fped.2021.716424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 08/17/2021] [Indexed: 11/28/2022] Open
Abstract
The timely and accurate genetic diagnosis of Duchenne muscular dystrophy (DMD) enables prompt initiation of disease management and genetic counseling and optimal patient care. Despite the existence of best practice guidelines for the diagnosis of DMD, implementation of these recommendations in different parts of the world is challenging. Here, we present 4 unique case studies which illustrate the different diagnostic pathways of patients with DMD in Middle Eastern countries and highlight region-specific challenges to achieving timely and accurate genetic diagnosis of DMD. A lack of disease awareness and consequential failure to recognize the signs and symptoms of DMD significantly contributed to the delayed diagnoses of these patients. Additional challenges included limited available funding for genetic testing and a lack of local specialist and genetic testing centers, causing patients and their families to travel vast distances for appointments in some countries. Earlier and more accurate genetic diagnosis of DMD in this region would allow patients to benefit from effective disease management, leading to improvements in health-related quality of life.
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Affiliation(s)
- Fouad Alghamdi
- Neuroscience Center, King Fahad Specialist Hospital, Dammam, Saudi Arabia
| | - Asmaa Al-Tawari
- Pediatric Neurology Unit, Pediatric Department, Al-Sabah Hospital, Kuwait City, Kuwait
| | - Hadil Alrohaif
- Kuwait Medical Genetics Centre, Al-Sabah Hospital, Kuwait City, Kuwait
| | - Walaa Alshuaibi
- College of Medicine, King Saud University, Riyadh, Saudi Arabia.,Medical Genetics Division, Pediatrics Department, King Saud University, Riyadh, Saudi Arabia
| | - Hicham Mansour
- Pediatric Department, Saint George Hospital, Balamand University, Beirut, Lebanon
| | | | - André Mégarbané
- Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Byblos, Lebanon
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Mégarbané A, Hana S, El-Hayek S, Gambarini A, Al-Ali MT, Delague V. Developmental delay, intellectual disability, short stature, subglottic stenosis, hearing impairment, onychodysplasia of the index fingers, and distinctive facial features: A newly reported autosomal recessive syndrome. Am J Med Genet A 2020; 182:1865-1872. [PMID: 32618096 DOI: 10.1002/ajmg.a.61730] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 05/20/2020] [Accepted: 05/28/2020] [Indexed: 11/06/2022]
Abstract
We report on a multiply consanguineous Syrian family where two siblings, a boy and a girl, presented with a compilation of symptoms including developmental delay, severe intellectual disability, absent speech, hearing impairment, short stature, subglottic stenosis, increased length of the palpebral fissures, onychodysplasia of index fingers, scoliosis, genu valgum, and malpositioned toes. Two other individuals from the extended family with similar clinical features are also described. Array-CGH did not reveal any pathological copy number variation. Exome sequencing failed to find any causal variants. Differential diagnoses and the possibility that we might be reporting a hitherto unknown syndrome are discussed.
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Affiliation(s)
- André Mégarbané
- Institut Jérôme Lejeune, Paris, France.,Faculty of Medical Sciences, Lebanese University, Beirut, Lebanon
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11
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Mégarbané A, Piquemal D, Rebillat AS, Stora S, Pierrat F, Bruno R, Noguier F, Mircher C, Ravel A, Vilaire-Meunier M, Durand S, Lefranc G. Transcriptomic study in women with trisomy 21 identifies a possible role of the GTPases of the immunity-associated proteins (GIMAP) in the protection of breast cancer. Sci Rep 2020; 10:9447. [PMID: 32523132 PMCID: PMC7286899 DOI: 10.1038/s41598-020-66469-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 05/22/2020] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND People with trisomy 21 (T21) are predisposed to developing hematological tumors, but have significantly lower-than-expected age-adjusted incidence rates of having a solid tumor. MATERIAL AND METHODS To identify novel genetic factors implicated in the lower breast cancer (BC) frequency observed in women with T21 than in the general population, we compared the transcriptome pattern of women with a homogeneous T21, aged more than 30 years, with or without BC, and tumoral BC tissue of control women with a normal karyotype from the study of Varley et al. (2014). RESULTS Differential analysis of gene expression between the 15 women in the T21 without BC group and BC patients in the other groups (two women with T21 and fifteen control women, respectively) revealed 154 differentially expressed genes, of which 63 were found to have similar expression profile (up- or downregulated). Of those 63 genes, four were in the same family, namely GIMAP4, GIMAP6, GIMAP7 and GIMAP8, and were strongly upregulated in the T21 without BC group compared to the other groups. A significant decrease in mRNA levels of these genes in BC tissues compared to non-tumor breast tissues was also noted. CONCLUSION We found that the expression of some GIMAPs is significantly higher in women with T21 without BC than in patients with sporadic BC. Our findings support the hypothesis that GIMAPs may play a tumor-suppressive role against BC, and open the possibility that they may also have the same role for other solid tumors in T21 patients. The search for new prognostic factors and hopefully new therapeutic or preventive strategies against BC are discussed.
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Affiliation(s)
- André Mégarbané
- Institut Jérôme Lejeune, CRB BioJeL, Paris, France. .,Faculty of Medical Sciences, Lebanese University, Beirut, Lebanon.
| | | | | | | | | | | | | | | | - Aimé Ravel
- Institut Jérôme Lejeune, CRB BioJeL, Paris, France
| | | | | | - Gérard Lefranc
- Institut de Génétique Humaine, UMR 9002 CNRS-Université de Montpellier, Montpellier, France
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12
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Mégarbané A, Deepthi A, Obeid M, T Al-Ali M, Gambarini A, El-Hayek S. Homozygous deletion of exons 2-7 within TGFB3 gene in a child with severe Loeys-Dietz syndrome and Marfan-like features. Am J Med Genet A 2020; 182:1230-1235. [PMID: 32022420 DOI: 10.1002/ajmg.a.61508] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 01/14/2020] [Accepted: 01/23/2020] [Indexed: 01/16/2023]
Abstract
We describe a patient with palatal abnormalities-cleft palate and bifid uvula; distinctive facial features-long and triangular face, large ears and nose, thin lips and dental crowding; musculoskeletal abnormalities-severe scoliosis, joint laxity, long digits, flat feet, decreased muscle mass, and diminished muscle strength; and cardiac features-a dilatated ascending aorta at the level of Valsalva sinuses and a patent foramen ovale. Sequence analysis and deletion/duplication testing for a panel of genes involved in connective tissue disorders revealed the presence of a novel homozygous deletion of exons 2-7 in TGFB3 gene. Heterozygous pathogenic mutations in TGFB3 have been associated with Loeys-Dietz syndrome 5 (LDS5) and Arrhythmogenic Right Ventricular Dysplasia type 1. Here, we report the first case of a homozygous TGFB3 variant associated with a severe LDS5 and Marfan-like presentation.
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Affiliation(s)
| | - Asha Deepthi
- Centre for Arab Genomic Studies, Dubai, United Arab Emirates
| | - Marc Obeid
- American University of Science and Technology, Faculty of Health Sciences, Lebanon
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13
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Bizzari S, El-Bazzal L, Nair P, Younan A, Stora S, Mehawej C, El-Hayek S, Delague V, Mégarbané A. Recessive marfanoid syndrome with herniation associated with a homozygous mutation in Fibulin-3. Eur J Med Genet 2020; 63:103869. [PMID: 32006683 DOI: 10.1016/j.ejmg.2020.103869] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 01/26/2020] [Accepted: 01/27/2020] [Indexed: 01/10/2023]
Abstract
We have previously reported on a consanguineous family where 2 siblings, a girl and a boy, presented with tall stature, long and triangular faces, prominent forehead, telecanthus, ptosis, everted lower eyelids, downslanting palpebral fissures, large ears, high arched palate, long arm span, arachnodactyly, advanced bone age, joint laxity, pectus excavatum, inguinal hernia, and myopia, suggestive of a new subtype of connective tissue disorder (Megarbane et al. AJMG, 2012; 158(A)5: 1185-1189). On clinical follow-up, both patients had multiple inguinal, crural, and abdominal herniae, intestinal occlusions, several huge diverticula throughout the gut and the bladder, and rectal prolapse. In addition, the girl had a mild hearing impairment, and the boy a left diaphragmatic hernia. Here we describe the molecular characterization of this disorder using Whole Exome Sequencing, revealing, in both siblings, a novel homozygous missense variant in the EFEMP1 gene, c.163T > C; p.(Cys55Arg) whose homozygous by descent, autosomal recessive transmission was confirmed through segregation analysis by Sanger sequencing. In addition, the girl exhibited a homozygous mutation in the MYO3A gene, c.1370_1371delGA; p.(Arg457Asnfs*25), associated with non-syndromic deafness. The siblings were also found to harbor a homozygous nonsense variant in the VCPKMT gene. We review the literature and discuss our updated clinical and molecular findings that suggest EFEMP1 to be the probable candidate gene implicated in this novel connective tissue disease.
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Affiliation(s)
- Sami Bizzari
- Centre for Arab Genomic Studies, Dubai, United Arab Emirates
| | - Lara El-Bazzal
- Aix Marseille Univ, Inserm, MMG, U 1251, Marseille, France
| | - Pratibha Nair
- Centre for Arab Genomic Studies, Dubai, United Arab Emirates
| | | | | | | | | | | | - André Mégarbané
- Institut Jérôme Lejeune, CRB BioJeL, Paris, France; INOVIE-MENA, Beirut, Lebanon.
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14
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Haertle L, Müller T, Lardenoije R, Maierhofer A, Dittrich M, Riemens RJM, Stora S, Roche M, Leber M, Riedel-Heller S, Wagner M, Scherer M, Ravel A, Mircher C, Cieuta-Walti C, Durand S, van de Hove DLA, Hoffmann P, Ramirez A, Haaf T, El Hajj N, Mégarbané A. Methylomic profiling in trisomy 21 identifies cognition- and Alzheimer's disease-related dysregulation. Clin Epigenetics 2019; 11:195. [PMID: 31843015 PMCID: PMC6916110 DOI: 10.1186/s13148-019-0787-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 11/25/2019] [Indexed: 11/28/2022] Open
Abstract
Abstract Background Trisomy 21 (T21) is associated with intellectual disability that ranges from mild to profound with an average intellectual quotient of around 50. Furthermore, T21 patients have a high risk of developing Alzheimer’s disease (AD) early in life, characterized by the presence of senile plaques of amyloid protein and neurofibrillary tangles, leading to neuronal loss and cognitive decline. We postulate that epigenetic factors contribute to the observed variability in intellectual disability, as well as at the level of neurodegeneration seen in T21 individuals. Materials and Methods A genome-wide DNA methylation study was performed using Illumina Infinium® MethylationEPIC BeadChips on whole blood DNA of 3 male T21 patients with low IQ, 8 T21 patients with high IQ (4 males and 4 females), and 21 age- and sex-matched control samples (12 males and 9 females) in order to determine whether DNA methylation alterations could help explain variation in cognitive impairment between individuals with T21. In view of the increased risk of developing AD in T21 individuals, we additionally investigated the T21-associated sites in published blood DNA methylation data from the AgeCoDe cohort (German study on Ageing, Cognition, and Dementia). AgeCoDe represents a prospective longitudinal study including non-demented individuals at baseline of which a part develops AD dementia at follow-up. Results Two thousand seven hundred sixteen differentially methylated sites and regions discriminating T21 and healthy individuals were identified. In the T21 high and low IQ comparison, a single CpG located in the promoter of PELI1 was differentially methylated after multiple testing adjustment. For the same contrast, 69 differentially methylated regions were identified. Performing a targeted association analysis for the significant T21-associated CpG sites in the AgeCoDe cohort, we found that 9 showed significant methylation differences related to AD dementia, including one in the ADAM10 gene. This gene has previously been shown to play a role in the prevention of amyloid plaque formation in the brain. Conclusion The differentially methylated regions may help understand the interaction between methylation alterations and cognitive function. In addition, ADAM10 might be a valuable blood-based biomarker for at least the early detection of AD.
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Affiliation(s)
- Larissa Haertle
- Institute of Human Genetics, Julius Maximilian University, Wuerzburg, Germany.,Division of Hematology and Oncology, Department of Internal Medicine II, University Hospital, Wuerzburg, Germany
| | - Tobias Müller
- Department of Bioinformatics, Julius Maximilian University, Wuerzburg, Germany
| | - Roy Lardenoije
- Department of Psychiatry & Neuropsychology, School for Mental Health and Neuroscience (MHeNs), Maastricht University, Maastricht, the Netherlands.,Department of Psychiatry and Psychotherapy, University Medical Center Göttingen, Göttingen, Germany
| | - Anna Maierhofer
- Institute of Human Genetics, Julius Maximilian University, Wuerzburg, Germany
| | - Marcus Dittrich
- Institute of Human Genetics, Julius Maximilian University, Wuerzburg, Germany.,Department of Bioinformatics, Julius Maximilian University, Wuerzburg, Germany
| | - Renzo J M Riemens
- Institute of Human Genetics, Julius Maximilian University, Wuerzburg, Germany.,Department of Psychiatry & Neuropsychology, School for Mental Health and Neuroscience (MHeNs), Maastricht University, Maastricht, the Netherlands
| | - Samantha Stora
- Institut Jérôme Lejeune, CRB BioJeL, 37 rue des Volontaires, Paris, France
| | - Mathilde Roche
- Institut Jérôme Lejeune, CRB BioJeL, 37 rue des Volontaires, Paris, France
| | - Markus Leber
- Division of Neurogenetics and Molecular Psychiatry, Department of Psychiatry and Psychotherapy, University of Cologne, Medical Faculty, 50937, Cologne, Germany.,Department of Neurodegeneration and Geriatric Psychiatry, University of Bonn, 53127, Bonn, Germany
| | - Steffi Riedel-Heller
- Institute of Social Medicine, Occupational Health and Public Health, University of Leipzig, 04103, Leipzig, Germany
| | - Michael Wagner
- Department of Neurodegeneration and Geriatric Psychiatry, University of Bonn, 53127, Bonn, Germany.,German Center for Neurodegenerative Diseases (DZNE), 53127, Bonn, Germany
| | - Martin Scherer
- Department of Primary Medical Care, University Medical Centre Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Aimé Ravel
- Institut Jérôme Lejeune, CRB BioJeL, 37 rue des Volontaires, Paris, France
| | - Clotilde Mircher
- Institut Jérôme Lejeune, CRB BioJeL, 37 rue des Volontaires, Paris, France
| | | | - Sophie Durand
- Institut Jérôme Lejeune, CRB BioJeL, 37 rue des Volontaires, Paris, France
| | - Daniel L A van de Hove
- Department of Psychiatry & Neuropsychology, School for Mental Health and Neuroscience (MHeNs), Maastricht University, Maastricht, the Netherlands.,Department of Psychiatry, Psychosomatics and Psychotherapy, University of Wuerzburg, Wuerzburg, Germany
| | - Per Hoffmann
- Institute of Human Genetics, University of Bonn, 53127, Bonn, Germany.,Department of Genomics, Life & Brain Center, University of Bonn, 53127, Bonn, Germany.,Division of Medical Genetics, University Hospital and Department of Biomedicine, University of Basel, CH-4058, Basel, Switzerland
| | - Alfredo Ramirez
- Division of Neurogenetics and Molecular Psychiatry, Department of Psychiatry and Psychotherapy, University of Cologne, Medical Faculty, 50937, Cologne, Germany.,Department of Neurodegeneration and Geriatric Psychiatry, University of Bonn, 53127, Bonn, Germany
| | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilian University, Wuerzburg, Germany
| | - Nady El Hajj
- Institute of Human Genetics, Julius Maximilian University, Wuerzburg, Germany.,College of Health and Life Sciences, Hamad Bin Khalifa University, Education City, Doha, Qatar
| | - André Mégarbané
- Institut Jérôme Lejeune, CRB BioJeL, 37 rue des Volontaires, Paris, France.
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15
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Le Caignec C, Pichon O, Briand A, de Courtivron B, Bonnard C, Lindenbaum P, Redon R, Schluth-Bolard C, Diguet F, Rollat-Farnier PA, Sanchez-Castro M, Vuillaume ML, Sanlaville D, Duboule D, Mégarbané A, Toutain A. Fryns type mesomelic dysplasia of the upper limbs caused by inverted duplications of the HOXD gene cluster. Eur J Hum Genet 2019; 28:324-332. [PMID: 31591517 DOI: 10.1038/s41431-019-0522-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 07/12/2019] [Accepted: 09/17/2019] [Indexed: 01/09/2023] Open
Abstract
The HoxD cluster is critical for vertebrate limb development. Enhancers located in both the telomeric and centromeric gene deserts flanking the cluster regulate the transcription of HoxD genes. In rare patients, duplications, balanced translocations or inversions misregulating HOXD genes are responsible for mesomelic dysplasia of the upper and lower limbs. By aCGH, whole-genome mate-pair sequencing, long-range PCR and fiber fluorescent in situ hybridization, we studied patients from two families displaying mesomelic dysplasia limited to the upper limbs. We identified microduplications including the HOXD cluster and showed that microduplications were in an inverted orientation and inserted between the HOXD cluster and the telomeric enhancers. Our results highlight the existence of an autosomal dominant condition consisting of isolated ulnar dysplasia caused by microduplications inserted between the HOXD cluster and the telomeric enhancers. The duplications likely disconnect the HOXD9 to HOXD11 genes from their regulatory sequences. This presumptive loss-of-function may have contributed to the phenotype. In both cases, however, these rearrangements brought HOXD13 closer to telomeric enhancers, suggesting that the alterations derive from the dominant-negative effect of this digit-specific protein when ectopically expressed during the early development of forearms, through the disruption of topologically associating domain structure at the HOXD locus.
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Affiliation(s)
- Cédric Le Caignec
- CHU Nantes, Service de Génétique Médicale, Nantes, France. .,Universite de Nantes, Nantes, France.
| | - Olivier Pichon
- CHU Nantes, Service de Génétique Médicale, Nantes, France
| | - Annaig Briand
- CHU Nantes, Service de Génétique Médicale, Nantes, France
| | | | - Christian Bonnard
- Service de Chirurgie Orthopédique Pédiatrique, CHRU de Tours, Tours, France.,Université François-Rabelais de Tours, PRES Centre-Val de Loire Université, Tours, France
| | - Pierre Lindenbaum
- INSERM, UMR_S1087, l'institut du thorax, Nantes, France.,CNRS, UMR 6291, Nantes, France
| | - Richard Redon
- INSERM, UMR_S1087, l'institut du thorax, Nantes, France.,CNRS, UMR 6291, Nantes, France
| | - Caroline Schluth-Bolard
- Department of Genetics, Lyon University Hospital, Lyon, France.,Claude Bernard Lyon I University, Lyon, France.,CRNL, CNRS UMR 5292, INSERM U1028, Lyon, France
| | - Flavie Diguet
- Department of Genetics, Lyon University Hospital, Lyon, France
| | | | | | - Marie-Laure Vuillaume
- Service de Génétique, Hôpital Bretonneau, CHU, Tours, France.,UMR 1253, iBrain, Université de Tours, Inserm, Tours, France
| | - Damien Sanlaville
- Department of Genetics, Lyon University Hospital, Lyon, France.,Claude Bernard Lyon I University, Lyon, France.,CRNL, CNRS UMR 5292, INSERM U1028, Lyon, France
| | - Denis Duboule
- University of Geneva and Federal Institute of Technology (EPFL), Lausanne, Switzerland
| | | | - Annick Toutain
- Service de Génétique, Hôpital Bretonneau, CHU, Tours, France.,UMR 1253, iBrain, Université de Tours, Inserm, Tours, France
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16
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Nair P, El-Bazzal L, Mansour H, Sabbagh S, Al-Ali MT, Gambarini A, Delague V, El-Hayek S, Mégarbané A. Further Delineation of the TRAPPC6B Disorder: Report on a New Family and Review. J Pediatr Genet 2019; 8:252-256. [PMID: 31687267 DOI: 10.1055/s-0039-1693664] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Accepted: 06/13/2019] [Indexed: 12/16/2022]
Abstract
Pathogenic variants in the TRAPPC6B gene were recently found to be associated in three consanguineous families, with microcephaly, epilepsy, and brain malformations. Here, we report on a 3.5-year-old boy, born to consanguineous Lebanese parents, who presented with developmental delay, lactic acidosis, postnatal microcephaly, and abnormal brain magnetic resonance imaging. By whole exome sequencing, a novel homozygous likely pathogenic variant in exon 1 of the TRAPPC6B gene (c.23T > A; [p.Leu8*]) was identified. A review of the clinical description and literature is discussed, pointing out the phenotypic heterogeneity associated with mutations in this gene.
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Affiliation(s)
| | - Lara El-Bazzal
- Aix Marseille University, Inserm, Marseille Medical Genetics
| | | | - Sandra Sabbagh
- Department of Pediatrics, Saint George Hospital, Beirut, Lebanon
| | | | | | - Valerie Delague
- Aix Marseille University, Inserm, Marseille Medical Genetics
| | | | - André Mégarbané
- Department of Pediatrics, Hotel-Dieu de France, Beirut, Lebanon.,Institut Jérôme Lejeune, BioJeL Biological Resource Center (CRB BioJeL), Paris, France
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17
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Nair P, Sabbagh S, Bizzari S, Brunner F, Stora S, Al-Ali MT, Gencik M, El-Hayek S, Mégarbané A. Report of a Second Lebanese Family with Basel-Vanagaite-Smirin-Yosef Syndrome: Possible Founder Mutation. Mol Syndromol 2019; 10:219-222. [PMID: 31602195 DOI: 10.1159/000501114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/11/2019] [Indexed: 12/21/2022] Open
Abstract
Basel-Vanagaite-Smirin-Yosef syndrome (OMIM 616449) is a rare autosomal recessive genetic disorder characterized by severe developmental delay and variable craniofacial, neurological, cardiac, and ocular anomalies in the presence of variants in the MED25 gene. So far, only a handful of patients have been reported with this condition globally. Here, we report an additional Lebanese family with 2 affected siblings presenting with severely delayed psychomotor and language development as well as craniofacial anomalies. By whole-exome sequencing (WES), a homozygous variant was found in the MED25 gene, c.518T>C, predicted to result in a p.Ile173Thr change in the MED25 protein. This change has recently been reported in another Lebanese family. Review of the literature, the importance of this mutation in the Lebanese population, and the possibility that this condition may be underdiagnosed and only effectively detected using molecular techniques such as WES are discussed.
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Affiliation(s)
| | - Sandra Sabbagh
- Pediatrics Department, Hôtel-Dieu de France Hospital, Beirut, Lebanon
| | | | | | | | | | | | | | - André Mégarbané
- Institut Jérôme Lejeune, CRB BioJeL, Paris, France.,INOVIE-MENA, Beirut, Lebanon
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18
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Nguyen K, Broucqsault N, Chaix C, Roche S, Robin JD, Vovan C, Gerard L, Mégarbané A, Urtizberea JA, Bellance R, Barnérias C, David A, Eymard B, Fradin M, Manel V, Sacconi S, Tiffreau V, Zagnoli F, Cuisset JM, Salort-Campana E, Attarian S, Bernard R, Lévy N, Magdinier F. Deciphering the complexity of the 4q and 10q subtelomeres by molecular combing in healthy individuals and patients with facioscapulohumeral dystrophy. J Med Genet 2019; 56:590-601. [PMID: 31010831 DOI: 10.1136/jmedgenet-2018-105949] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/28/2019] [Accepted: 03/24/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND Subtelomeres are variable regions between telomeres and chromosomal-specific regions. One of the most studied pathologies linked to subtelomeric imbalance is facioscapulohumeral dystrophy (FSHD). In most cases, this disease involves shortening of an array of D4Z4 macrosatellite elements at the 4q35 locus. The disease also segregates with a specific A-type haplotype containing a degenerated polyadenylation signal distal to the last repeat followed by a repetitive array of β-satellite elements. This classification applies to most patients with FSHD. A subset of patients called FSHD2 escapes this definition and carries a mutation in the SMCHD1 gene. We also recently described patients carrying a complex rearrangement consisting of a cis-duplication of the distal 4q35 locus identified by molecular combing. METHODS Using this high-resolution technology, we further investigated the organisation of the 4q35 region linked to the disease and the 10q26 locus presenting with 98% of homology in controls and patients. RESULTS Our analyses reveal a broad variability in size of the different elements composing these loci highlighting the complexity of these subtelomeres and the difficulty for genomic assembly. Out of the 1029 DNA samples analysed in our centre in the last 7 years, we also identified 54 cases clinically diagnosed with FSHD carrying complex genotypes. This includes mosaic patients, patients with deletions of the proximal 4q region and 23 cases with an atypical chromosome 10 pattern, infrequently found in the control population and never reported before. CONCLUSION Overall, this work underlines the complexity of these loci challenging the diagnosis and genetic counselling for this disease.
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Affiliation(s)
- Karine Nguyen
- Medical Genetics, Assistance Publique Hopitaux de Marseille, Marseille, France.,Aix Marseille Univ, INSERM, MMG, Marseille Medical Genetics U1251, Marseille, France
| | - Natacha Broucqsault
- Aix Marseille Univ, INSERM, MMG, Marseille Medical Genetics U1251, Marseille, France
| | - Charlene Chaix
- Medical Genetics, Assistance Publique Hopitaux de Marseille, Marseille, France
| | - Stephane Roche
- Aix Marseille Univ, INSERM, MMG, Marseille Medical Genetics U1251, Marseille, France
| | - Jérôme D Robin
- Aix Marseille Univ, INSERM, MMG, Marseille Medical Genetics U1251, Marseille, France
| | - Catherine Vovan
- Medical Genetics, Assistance Publique Hopitaux de Marseille, Marseille, France
| | - Laurene Gerard
- Medical Genetics, Assistance Publique Hopitaux de Marseille, Marseille, France
| | | | - Jon Andoni Urtizberea
- Pôle Soins de suite et réadaptation handicaps lourds et maladies rares neurologiques, Hôpital Marin, Assistance publique des hopitaux de Paris, Hendaye, France
| | - Remi Bellance
- Hopital Pierre Zobda-Quitman, Fort-de-France, France
| | - Christine Barnérias
- Service de Neurologie infantile, Université Paris Descartes, Sorbonne Paris Cité, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Paris, France.,Centre de Référence de Maladies Neuromusculaires Garches-Necker-Mondor-Hendaye (GNMH), Réseau National Français de la Filière Neuromusculaire (FILNEMUS), Paris, France
| | | | - Bruno Eymard
- Assistance Publique - Hopitaux de Paris, Paris, Île-de-France, France
| | - Melanie Fradin
- Service de Génétique Médicale, Centre De Référence Anomalies du Développement, CHU de Rennes, Rennes, France
| | - Véronique Manel
- Centre référent maladies neuromusculaires rares, Hospices Civils de Lyon, Hôpital Femme Mère Enfant, Bron, France
| | - Sabrina Sacconi
- Peripheral Nervous System, Muscle and ALS Department, Université Côte d'Azur, Nice, France.,Institute for Research on Cancer and Aging of Nice, Université Côte d'Azur, Faculty of Medicine, Nice, France
| | - Vincent Tiffreau
- Centre de Référence des Maladies Neuromusculaires, service de Médecine Physique et de Réadaptation, Centre hospitalier régionale de Lille, Lille, France
| | - Fabien Zagnoli
- Centre de Référence des Maladies Neuromusculaires, CHU Morvan, Brest, France
| | | | - Emmanuelle Salort-Campana
- Aix Marseille Univ, INSERM, MMG, Marseille Medical Genetics U1251, Marseille, France.,Centre de reference des maladies neuromusculaires, Assistance Publique Hopitaux de Marseille, Marseille, France
| | - Shahram Attarian
- Aix Marseille Univ, INSERM, MMG, Marseille Medical Genetics U1251, Marseille, France.,Centre de reference des maladies neuromusculaires, Assistance Publique Hopitaux de Marseille, Marseille, France
| | - Rafaëlle Bernard
- Medical Genetics, Assistance Publique Hopitaux de Marseille, Marseille, France.,Aix Marseille Univ, INSERM, MMG, Marseille Medical Genetics U1251, Marseille, France
| | - Nicolas Lévy
- Medical Genetics, Assistance Publique Hopitaux de Marseille, Marseille, France.,Aix Marseille Univ, INSERM, MMG, Marseille Medical Genetics U1251, Marseille, France
| | - Frederique Magdinier
- Aix Marseille Univ, INSERM, MMG, Marseille Medical Genetics U1251, Marseille, France
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19
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Mansour H, Sabbagh S, Bizzari S, El-Hayek S, Chouery E, Gambarini A, Gencik M, Mégarbané A. The Lebanese Allele in the PET100 Gene: Report on Two New Families with Cytochrome c Oxidase Deficiency. J Pediatr Genet 2019; 8:172-178. [PMID: 31406627 DOI: 10.1055/s-0039-1685172] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 03/01/2019] [Indexed: 10/27/2022]
Abstract
Cytochrome c oxidase deficiency is caused by mutations in any of at least 30 mitochondrial and nuclear genes involved in mitochondrial complex IV biogenesis and structure, including the recently identified PET100 gene. Here, we report two families, of which one is consanguineous, with two affected siblings each. In one family, the siblings presented with developmental delay, seizures, lactic acidosis, abnormal brain magnetic resonance imaging, and low muscle mitochondrial complex IV activity at 30%. In the other family, the two siblings, now deceased, had a history of global developmental delay, failure to thrive, muscular hypotonia, seizures, developmental regression, respiratory insufficiency, and lactic acidosis. By whole exome sequencing, a missense mutation in exon 1 of the PET100 gene (c.3G > C; [p.Met1?]) was identified in both families. A review of the clinical description and literature is discussed, highlighting the importance of this variant in the Lebanese population.
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Affiliation(s)
- Hicham Mansour
- Department of Pediatrics, Saint George Hospital, Beirut, Lebanon
| | - Sandra Sabbagh
- Department Pediatrics, Hotel-Dieu de France, Beirut, Lebanon
| | - Sami Bizzari
- Centre for Arab Genomic Studies, Dubai, United Arab Emirates
| | | | - Eliane Chouery
- Unité de Génétique Médicale, Université Saint Joseph, Beirut, Lebanon
| | | | | | - André Mégarbané
- INOVIE-MENA, Beirut, Lebanon.,Institut Jérôme Lejeune, CRB BioJeL, Paris, France
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20
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El-Bazzal L, Rihan K, Bernard-Marissal N, Castro C, Chouery-Khoury E, Desvignes JP, Atkinson A, Bertaux K, Koussa S, Lévy N, Bartoli M, Mégarbané A, Jabbour R, Delague V. Loss of Cajal bodies in motor neurons from patients with novel mutations in VRK1. Hum Mol Genet 2019; 28:2378-2394. [DOI: 10.1093/hmg/ddz060] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 03/17/2019] [Accepted: 03/18/2019] [Indexed: 12/31/2022] Open
Abstract
Abstract
Distal hereditary motor neuropathies (dHMNs) are a heterogeneous group of diseases, resembling Charcot–Marie–Tooth syndromes, but characterized by an exclusive involvement of the motor part of the peripheral nervous system.
Here, we describe two new compound heterozygous mutations in VRK1, the vaccinia-related kinase 1 gene, in two siblings from a Lebanese family, affected with dHMN associated with upper motor neurons (MNs) signs. The mutations lead to severely reduced levels of VRK1 by impairing its stability, and to a shift of nuclear VRK1 to cytoplasm. Depletion of VRK1 from the nucleus alters the dynamics of coilin, a phosphorylation target of VRK1, by reducing its stability through increased proteasomal degradation. In human-induced pluripotent stem cell-derived MNs from patients, we demonstrate that this drop in VRK1 levels leads to Cajal bodies (CBs) disassembly and to defects in neurite outgrowth and branching. Mutations in VRK1 have been previously reported in several neurological diseases affecting lower or both upper and lower MNs. Here, we describe a new phenotype linked to VRK1 mutations, presenting as a classical slowly progressive motor neuropathy, beginning in the second decade of life, with associated upper MN signs. We provide, for the first time, evidence for a role of VRK1 in regulating CB assembly in MNs. The observed MN defects are consistent with a length dependent axonopathy affecting lower and upper MNs, and we propose that diseases due to mutations in VRK1 should be grouped under a unique entity named `VRK1-related motor neuron disease’.
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Affiliation(s)
- Lara El-Bazzal
- Aix Marseille Univ, Inserm, MMG, U 1251, Marseille, France
| | - Khalil Rihan
- Aix Marseille Univ, Inserm, MMG, U 1251, Marseille, France
| | | | | | - Eliane Chouery-Khoury
- Unité de Génétique Médicale, Université Saint Joseph, Campus des Sciences Médicales, Beirut, Lebanon
| | | | | | - Karine Bertaux
- Medical Genetics, Biological Resource Center—Tissue, DNA, Cells, CRB TAC, La Timone Children’s Hospital, Marseille, France
| | - Salam Koussa
- Department of Neurology, Lebanese University Hospital-Geitaoui, Beirut, Lebanon
| | - Nicolas Lévy
- Aix Marseille Univ, Inserm, MMG, U 1251, Marseille, France
- Department of Medical Genetics, Children’s Hospital La Timone, Marseille, France
| | - Marc Bartoli
- Aix Marseille Univ, Inserm, MMG, U 1251, Marseille, France
| | - André Mégarbané
- Centre Médical et Psychopédagogique, Beirut, Lebanon
- Institut Jérôme Lejeune, Paris, France
| | - Rosette Jabbour
- Neurology Division, Department of Internal Medicine, St George Hospital University Medical Center, University of Balamand, Beirut, Lebanon
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21
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Jalkh N, Corbani S, Haidar Z, Hamdan N, Farah E, Abou Ghoch J, Ghosn R, Salem N, Fawaz A, Djambas Khayat C, Rajab M, Mourani C, Moukarzel A, Rassi S, Gerbaka B, Mansour H, Baassiri M, Dagher R, Breich D, Mégarbané A, Desvignes JP, Delague V, Mehawej C, Chouery E. The added value of WES reanalysis in the field of genetic diagnosis: lessons learned from 200 exomes in the Lebanese population. BMC Med Genomics 2019; 12:11. [PMID: 30665423 PMCID: PMC6341681 DOI: 10.1186/s12920-019-0474-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 01/11/2019] [Indexed: 12/30/2022] Open
Abstract
Background The past few decades have witnessed a tremendous development in the field of genetics. The implementation of next generation sequencing (NGS) technologies revolutionized the field of molecular biology and made the genetic information accessible at a large scale. However, connecting a rare genetic variation to a complex phenotype remains challenging. Indeed, identifying the cause of a genetic disease requires a multidisciplinary approach, starting with the establishment of a clear phenotype with a detailed family history and ending, in some cases, with functional assays that are crucial for the validation of the pathogenicity of a mutation. Methods Two hundred Lebanese patients, presenting a wide spectrum of genetic disorders (neurodevelopmental, neuromuscular or metabolic disorders, etc.), sporadic or inherited, dominant or recessive, were referred, over the last three and a half years, to the Medical Genetics Unit (UGM) of Saint Joseph University (USJ). In order to identify the genetic basis of these diseases, Whole Exome Sequencing (WES), followed by a targeted analysis, was performed for each case. In order to improve the genetic diagnostic yield, WES data, generated during the first 2 years of this study, were reanalyzed for all patients who were left undiagnosed at the genetic level. Reanalysis was based on updated bioinformatics tools and novel gene discoveries. Results Our initial analysis allowed us to identify the specific genetic mutation causing the disease in 49.5% of the cases, in line with other international studies. Repeated WES analysis enabled us to increase the diagnostics yield to 56%. Conclusion The present article reports the detailed results of both analysis and pinpoints the contribution of WES data reanalysis to an efficient genetic diagnosis. Lessons learned from WES reanalysis and interpretation are also shared.
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Affiliation(s)
- Nadine Jalkh
- Unité de Génétique Médicale, Faculté de Médecine, Campus De l'innovation et du sport, Université Saint-Joseph, rue de Damas, Beirut, Lebanon
| | - Sandra Corbani
- Unité de Génétique Médicale, Faculté de Médecine, Campus De l'innovation et du sport, Université Saint-Joseph, rue de Damas, Beirut, Lebanon
| | - Zahraa Haidar
- Unité de Génétique Médicale, Faculté de Médecine, Campus De l'innovation et du sport, Université Saint-Joseph, rue de Damas, Beirut, Lebanon
| | - Nadine Hamdan
- Unité de Génétique Médicale, Faculté de Médecine, Campus De l'innovation et du sport, Université Saint-Joseph, rue de Damas, Beirut, Lebanon
| | - Elias Farah
- Service de technologie de l'information, Saint Joseph University, Beirut, Lebanon
| | - Joelle Abou Ghoch
- Unité de Génétique Médicale, Faculté de Médecine, Campus De l'innovation et du sport, Université Saint-Joseph, rue de Damas, Beirut, Lebanon
| | - Rouba Ghosn
- Unité de Génétique Médicale, Faculté de Médecine, Campus De l'innovation et du sport, Université Saint-Joseph, rue de Damas, Beirut, Lebanon
| | - Nabiha Salem
- Unité de Génétique Médicale, Faculté de Médecine, Campus De l'innovation et du sport, Université Saint-Joseph, rue de Damas, Beirut, Lebanon
| | - Ali Fawaz
- Neuropediatrics Department, Lebanese University, Beirut, Lebanon
| | - Claudia Djambas Khayat
- Division of Pediatrics, Hotel Dieu de France Hospital, Beirut, Lebanon.,Department of Pediatrics Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Mariam Rajab
- Department of Pediatrics, Makassed General Hospital, Beirut, Lebanon
| | - Chebl Mourani
- Division of Pediatrics, Hotel Dieu de France Hospital, Beirut, Lebanon.,Department of Pediatrics Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Adib Moukarzel
- Division of Pediatrics, Hotel Dieu de France Hospital, Beirut, Lebanon.,Department of Pediatrics Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Simon Rassi
- Department of Otolaryngology-Head and Neck Surgery, Hotel Dieu de France Hospital, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Bernard Gerbaka
- Division of Pediatrics, Hotel Dieu de France Hospital, Beirut, Lebanon.,Department of Pediatrics Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Hicham Mansour
- Pediatric Neurometabolic Unit, Saint George University Medical Center, Beyrouth, Lebanon
| | - Malek Baassiri
- Department of Oncology, Hammoud Hospital University Medical Center, Saida, Lebanon
| | - Rawane Dagher
- Department of Pediatrics, Notre Dame De Secours University Hospital, Byblos, Lebanon
| | - David Breich
- Department of Pediatrics, Chtoura Hospital, Chtoura, Lebanon
| | - André Mégarbané
- Unité de Génétique Médicale, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon.,Institut Jérôme Lejeune, Paris, France
| | | | | | - Cybel Mehawej
- Unité de Génétique Médicale, Faculté de Médecine, Campus De l'innovation et du sport, Université Saint-Joseph, rue de Damas, Beirut, Lebanon
| | - Eliane Chouery
- Unité de Génétique Médicale, Faculté de Médecine, Campus De l'innovation et du sport, Université Saint-Joseph, rue de Damas, Beirut, Lebanon.
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22
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Mégarbané A, Hmaimess G, Bizzari S, El-Bazzal L, Al-Ali MT, Stora S, Delague V, El-Hayek S. A novel PDE6D mutation in a patient with Joubert syndrome type 22 (JBTS22). Eur J Med Genet 2018; 62:103576. [PMID: 30423442 DOI: 10.1016/j.ejmg.2018.11.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 10/02/2018] [Accepted: 11/09/2018] [Indexed: 10/27/2022]
Abstract
Joubert syndrome (JS) is an autosomal or X-linked recessive syndrome principally characterized by hypotonia, ataxia, cognitive impairment, and a specific finding on brain imaging called a "molar tooth sign" (MTS), which can be isolated or in conjunction with variable organ involvement. The genetic basis of JS is heterogeneous, with over 35 ciliary genes being implicated in its pathogenesis. However, some of these genes (such as PDE6D) have been associated to JS only in single families, seeking confirmation. Here we report a boy, born to first cousin parents, presenting with developmental delay, hypotonia, microcephaly, post axial polydactyly, oculomotor apraxia, and MTS. Whole exome sequencing revealed the presence of a novel homozygous truncating variant in the PDE6D gene: NM_002601.3:c.367_368insG [p.(Leu123Cysfs*13)]. The variant was confirmed by Sanger sequencing and found at the heterozygous state in both parents. A review of the literature pertaining to the role of PDE6D in JS is discussed.
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Affiliation(s)
| | | | - Sami Bizzari
- Centre for Arab Genomic Studies, Dubai, United Arab Emirates
| | - Lara El-Bazzal
- Aix Marseille Univ, Inserm, MMG, U 1251, Marseille, France
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23
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Nair P, Lama M, El-Hayek S, Abou Sleymane G, Stora S, Obeid M, Al-Ali MT, Delague V, Mégarbané A. COQ8A and MED25 Mutations in a Child with Intellectual Disability, Microcephaly, Seizures, and Spastic Ataxia: Synergistic Effect of Digenic Variants? Mol Syndromol 2018; 9:319-323. [PMID: 30800049 DOI: 10.1159/000494465] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/29/2018] [Indexed: 12/31/2022] Open
Abstract
We report on a girl, born to first-cousin Lebanese parents, with severe intellectual disability, congenital hip luxation, cardiac malformation, short stature, facial dysmorphic features including microcephaly, sparse hair, bilateral epicanthal folds, ataxia, seizures, and elevated lactate and pyruvate levels in serum. Whole exome sequencing was carried out on the patient's DNA. Potentially causal homozygous variants in the MED25 (p.Ile173Thr) and COQ8A (p.Arg512Trp) genes were found. The potential pathogenicity of these variants, and the possibility that the 2 variants could synergistically act to produce the phenotype reported, is discussed.
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Affiliation(s)
- Pratibha Nair
- Centre for Arab Genomic Studies, Dubai, United Arab Emirates
| | - Maher Lama
- Pediatric Department El-Rassoul Hospital, Beirut, Lebanon
| | | | - Gretta Abou Sleymane
- Department of Laboratory Science and Technology, American University of Science and Technology, Beirut, Lebanon
| | | | - Marc Obeid
- Department of Laboratory Science and Technology, American University of Science and Technology, Beirut, Lebanon
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24
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Nair P, Sabbagh S, Mansour H, Fawaz A, Hmaimess G, Noun P, Dagher R, Megarbane H, Hana S, Alame S, Lamaa M, Hasbini D, Farah R, Rajab M, Stora S, El-Tourjuman O, Abou Jaoude P, Chalouhi G, Sayad R, Gillart AC, Al-Ali M, Delague V, El-Hayek S, Mégarbané A. Contribution of next generation sequencing in pediatric practice in Lebanon. A Study on 213 cases. Mol Genet Genomic Med 2018; 6:1041-1052. [PMID: 30293248 PMCID: PMC6305638 DOI: 10.1002/mgg3.480] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 08/28/2018] [Accepted: 08/29/2018] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND According to the Catalogue of Transmission Genetics in Arabs, less than half of diseases reported in Lebanese patients are mapped. In the recent years, Next Generation Sequencing (NGS) techniques have significantly improved clinical diagnosis, compared to traditional sequencing methods. METHODS A total of 213 analyses by NGS (167 by whole exome sequencing (WES) and 46 by multigene panels tests) were performed on pediatric patients across different regions of Lebanon over a period of two years (December 2015-December 2017). RESULTS Neurological disorders were the most frequent referral demand for both WES and gene panels (122/213). Pathogenic, likely pathogenic, or variants of unknown significance were identified in 69.5% of the WES and panel patients combined. Over half of the patients with such variants had an autosomal recessive disorder. A definite molecular diagnosis (pathogenic or likely pathogenic variants) was achieved in 34.1% and 47.8% of the patients studied by WES and the multigene panels, respectively. Thirty-three novel variants were found in the cases that were molecularly solved; 26 of these being identified by WES and seven by the multigene panels. In three consanguineous families, autosomal recessive inheritance of genes previously reported as showing dominant inheritance patterns were found. Biallelism was found in six cases, digenism in four cases, and one case was trigenic. CONCLUSION Our study thus suggests that NGS tools are valuable for an improved clinical diagnosis, and highlights that the increased adoption of such techniques will significantly further improve our understanding of the genetic basis of inherited diseases in Lebanon.
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Affiliation(s)
| | - Sandra Sabbagh
- Pediatric Department, Hôtel Dieu de France Hospital, Beirut, Lebanon
| | - Hicham Mansour
- Pediatric Department, Saint George Hospital, Balamand University, Beirut, Lebanon
| | - Ali Fawaz
- Neuropediatrics Department, Lebanese University, Clemenceau Medical center, Beirut, Lebanon
| | - Ghassan Hmaimess
- Pediatric Department, Saint George Hospital, Balamand University, Beirut, Lebanon
| | - Peter Noun
- Pediatric Department, Saint George Hospital, Balamand University, Beirut, Lebanon
| | - Rawane Dagher
- Pediatric Department, Notre Dame de Secours, University Hospital, Byblos, Lebanon
| | - Hala Megarbane
- Dermatology Department, Saint George Hospital, Balamand University, Beirut, Lebanon
| | | | - Saada Alame
- Neuropediatrics Department, Lebanese University, Clemenceau Medical center, Beirut, Lebanon
| | - Maher Lamaa
- Pediatric Department El-Rassoul Hospital, Beirut, Lebanon
| | - Dana Hasbini
- Pediatric Neurology Department, Rafic Hariri University Hospital, Beirut, Lebanon
| | - Roula Farah
- Pediatric Department, Saint George Hospital, Balamand University, Beirut, Lebanon
| | - Mariam Rajab
- Pediatric Department, Makassed Hospital, Beirut, Lebanon
| | | | - Oulfat El-Tourjuman
- Pediatric Neurology Department, Rafic Hariri University Hospital, Beirut, Lebanon.,Pediatric Department, Makassed Hospital, Beirut, Lebanon
| | - Pauline Abou Jaoude
- Pediatric Department, Saint George Hospital, Balamand University, Beirut, Lebanon
| | - Gihad Chalouhi
- Simechol, Ecole d'enseignement et de Perfectionnement en Echographie Sur Simulateurs, Paris, France
| | - Rony Sayad
- Pediatric Department, Abou Jaoude Hospital, Beirut, Lebanon
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25
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Bruneel A, Cholet S, Drouin-Garraud V, Jacquemont ML, Cano A, Mégarbané A, Ruel C, Cheillan D, Dupré T, Vuillaumier-Barrot S, Seta N, Fenaille F. Complementarity of electrophoretic, mass spectrometric, and gene sequencing techniques for the diagnosis and characterization of congenital disorders of glycosylation. Electrophoresis 2018; 39:3123-3132. [PMID: 29869806 DOI: 10.1002/elps.201800021] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 05/09/2018] [Accepted: 05/25/2018] [Indexed: 12/25/2022]
Abstract
Congenital disorders of glycosylation (CDG) are rare autosomal genetic diseases affecting the glycosylation of proteins and lipids. Since CDG-related clinical symptoms are classically extremely variable and nonspecific, a combination of electrophoretic, mass spectrometric, and gene sequencing techniques is often mandatory for obtaining a definitive CDG diagnosis, as well as identifying causative gene mutations and deciphering the underlying biochemical mechanisms. Here, we illustrate the potential of integrating data from capillary electrophoresis of transferrin, two-dimensional electrophoresis of N- and O-glycoproteins, mass spectrometry analyses of total serum N-linked glycans and mucin core1 O-glycosylated apolipoprotein C-III for the determination of various culprit CDG gene mutations. "Step-by-step" diagnosis pathways of four particular and new CDG cases, including MGAT2-CDG, ATP6V0A2-CDG, SLC35A2-CDG, and SLC35A3-CDG, are described as illustrative examples.
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Affiliation(s)
- Arnaud Bruneel
- AP-HP, Biochimie Métabolique et Cellulaire, Hôpital Bichat-Claude Bernard, Paris, France.,INSERM UMR-1193 "Mécanismes cellulaires et moléculaires de l'adaptation au stress et cancérogenèse", Université Paris-Sud, Châtenay-Malabry, France
| | - Sophie Cholet
- Service de Pharmacologie et d'Immunoanalyse, Laboratoire d'Etude du Métabolisme des Médicaments, CEA, INRA, Université Paris Saclay, Gif-sur-Yvette, France
| | | | | | - Aline Cano
- Centre de Référence des Maladies Héréditaires du Métabolisme, CHU la Timone-Marseille, Marseille, France
| | | | - Coralie Ruel
- Service de Pharmacologie et d'Immunoanalyse, Laboratoire d'Etude du Métabolisme des Médicaments, CEA, INRA, Université Paris Saclay, Gif-sur-Yvette, France.,Proteins and Nanotechnology in Analytical Science (PNAS), CNRS, Université Paris-Sud, Châtenay-Malabry, France
| | - David Cheillan
- Service de Biochimie et Biologie Moléculaire Grand Est, UM Pathologies Métaboliques, Erythrocytaires et Dépistage Périnatal, Centre de Biologie et de Pathologie Est, Groupement Hospitalier Est-Hospices Civils de Lyon, Bron, France
| | - Thierry Dupré
- AP-HP, Biochimie Métabolique et Cellulaire, Hôpital Bichat-Claude Bernard, Paris, France
| | | | - Nathalie Seta
- AP-HP, Biochimie Métabolique et Cellulaire, Hôpital Bichat-Claude Bernard, Paris, France.,Paris Descartes University, Paris, France
| | - François Fenaille
- Service de Pharmacologie et d'Immunoanalyse, Laboratoire d'Etude du Métabolisme des Médicaments, CEA, INRA, Université Paris Saclay, Gif-sur-Yvette, France
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26
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Haidar Z, Jalkh N, Corbani S, Fawaz A, Chouery E, Mégarbané A. Atypical pyridoxine dependent epilepsy resulting from a new homozygous missense mutation, in ALDH7A1. Seizure 2018; 57:32-33. [DOI: 10.1016/j.seizure.2018.03.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 03/06/2018] [Accepted: 03/09/2018] [Indexed: 11/26/2022] Open
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27
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Mehawej C, Hoischen A, Farah RA, Marey I, David M, Stora S, Lachlan K, Brunner HG, Mégarbané A. Homozygous mutation in ELMO2 may cause Ramon syndrome. Clin Genet 2018; 93:703-706. [PMID: 29095483 DOI: 10.1111/cge.13166] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 10/24/2017] [Accepted: 10/30/2017] [Indexed: 11/30/2022]
Abstract
We report on a girl, born to first cousin Lebanese parents, with intellectual disability, seizures, repeated gingivorrhagia, enlarged lower and upper jaws, overgrowth of the gums, high arched and narrow palate, crowded teeth, hirsutism of the back, large abdomen and a small umbilical hernia. Cysts of the mandible, fibrous dysplasia of bones, and enlarged adenoids causing around 60% narrowing of the nasopharyngeal airways were noted at radiographic examination. Her brother presented with the same features in addition to a short stature, an ostium secundum, and more pronounced intellectual disability. He died at the age of 8 years from a severe pulmonary infection and repeated bleeding episodes. A clinical diagnosis of Ramon syndrome was made. Whole exome sequencing studies performed on the family revealed the presence of a novel homozygous missense mutation in ELMO2 gene, p.I606S in the affected individuals. Loss of function mutations in ELMO2 have been recently described in another clinically distinct condition: primary intraosseous vascular malformation or intraosseous hemangioma, called VMOS. Review of the literature and differential diagnoses are discussed.
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Affiliation(s)
- C Mehawej
- Unité de GénétiqueMédicale, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon
| | - A Hoischen
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, the Netherlands.,Department of Internal Medicine and Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands.,Radboud Institute for Molecular Life Sciences, Nijmegen, the Netherlands
| | - R A Farah
- Division of Hematology/Oncology, Department of Pediatrics, Saint George Hospital University Medical Center, Beirut, Lebanon
| | - I Marey
- Institut Jérôme Lejeune, Paris, France
| | - M David
- Institut Jérôme Lejeune, Paris, France
| | - S Stora
- Institut Jérôme Lejeune, Paris, France
| | - K Lachlan
- Human Genetics & Genomic Medicine, Southampton General Hospital, University of Southampton, Southampton, UK.,Wessex Clinical Genetics Service, Princess Anne Hospital, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - H G Brunner
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, the Netherlands.,Department of Clinical Genetics and GROW School for Oncology and Developmental Biology, Maastricht UMC, Maastricht, the Netherlands
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28
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Chouery E, Corbani S, Dahmen J, Zouari L, Gribaa M, Leban N, Ben Chibani J, Lefranc G, Saad A, Haj Khelil A, Urtizberea A, Mégarbané A. Progressive pseudorheumatoid dysplasia in North and West Africa: Clinical description in ten patients with mutations of WISP3. Egyptian Journal of Medical Human Genetics 2017. [DOI: 10.1016/j.ejmhg.2016.11.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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29
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Choucair N, Rajab M, Mégarbané A, Chouery E. Homozygous microdeletion of the ERI1 and MFHAS1 genes in a patient with intellectual disability, limb abnormalities, and cardiac malformation. Am J Med Genet A 2017; 173:1955-1960. [PMID: 28488351 DOI: 10.1002/ajmg.a.38271] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 04/03/2017] [Indexed: 02/03/2023]
Abstract
A male child, born from consanguineous parents and having intellectual disability, short stature, dysmorphic facial features, synpolydactyly, and cardiac malformations is reported. Chromosomal microarray analysis showed that the patient presents with an 8p23.1 homozygous deletion, containing the microRNA miR-4660, the exoribonuclease 1 (ERI1), and malignant fibrous histiocytoma amplified sequence 1 (MFHAS1) genes. The microRNA miR-4660 has no known function. MFHAS1 is an immunomodulatory protein involved in Toll-like receptor signaling, erythropoiesis, and cancer. ERI1 is a ribonuclease involved in RNA metabolism and is required for the correct patterning of the skeleton by defining the HOXC8 expression. We discuss the involvement of these deleted genes to the patient's features and highlight differential diagnoses with syndromes implicating limb extremity abnormalities such as synpolydactyly, including the monosomy 8p.
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Affiliation(s)
- Nancy Choucair
- Unité de Génétique Médicale, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon
| | - Mariam Rajab
- Department of Pediatrics, Makassed General Hospital, Beirut, Lebanon
| | | | - Eliane Chouery
- Unité de Génétique Médicale, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon
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Bruel AL, Franco B, Duffourd Y, Thevenon J, Jego L, Lopez E, Deleuze JF, Doummar D, Giles RH, Johnson CA, Huynen MA, Chevrier V, Burglen L, Morleo M, Desguerres I, Pierquin G, Doray B, Gilbert-Dussardier B, Reversade B, Steichen-Gersdorf E, Baumann C, Panigrahi I, Fargeot-Espaliat A, Dieux A, David A, Goldenberg A, Bongers E, Gaillard D, Argente J, Aral B, Gigot N, St-Onge J, Birnbaum D, Phadke SR, Cormier-Daire V, Eguether T, Pazour GJ, Herranz-Pérez V, Goldstein JS, Pasquier L, Loget P, Saunier S, Mégarbané A, Rosnet O, Leroux MR, Wallingford JB, Blacque OE, Nachury MV, Attie-Bitach T, Rivière JB, Faivre L, Thauvin-Robinet C. Fifteen years of research on oral-facial-digital syndromes: from 1 to 16 causal genes. J Med Genet 2017; 54:371-380. [PMID: 28289185 DOI: 10.1136/jmedgenet-2016-104436] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 01/27/2017] [Accepted: 01/27/2017] [Indexed: 11/03/2022]
Abstract
Oral-facial-digital syndromes (OFDS) gather rare genetic disorders characterised by facial, oral and digital abnormalities associated with a wide range of additional features (polycystic kidney disease, cerebral malformations and several others) to delineate a growing list of OFDS subtypes. The most frequent, OFD type I, is caused by a heterozygous mutation in the OFD1 gene encoding a centrosomal protein. The wide clinical heterogeneity of OFDS suggests the involvement of other ciliary genes. For 15 years, we have aimed to identify the molecular bases of OFDS. This effort has been greatly helped by the recent development of whole-exome sequencing (WES). Here, we present all our published and unpublished results for WES in 24 cases with OFDS. We identified causal variants in five new genes (C2CD3, TMEM107, INTU, KIAA0753 and IFT57) and related the clinical spectrum of four genes in other ciliopathies (C5orf42, TMEM138, TMEM231 and WDPCP) to OFDS. Mutations were also detected in two genes previously implicated in OFDS. Functional studies revealed the involvement of centriole elongation, transition zone and intraflagellar transport defects in OFDS, thus characterising three ciliary protein modules: the complex KIAA0753-FOPNL-OFD1, a regulator of centriole elongation; the Meckel-Gruber syndrome module, a major component of the transition zone; and the CPLANE complex necessary for IFT-A assembly. OFDS now appear to be a distinct subgroup of ciliopathies with wide heterogeneity, which makes the initial classification obsolete. A clinical classification restricted to the three frequent/well-delineated subtypes could be proposed, and for patients who do not fit one of these three main subtypes, a further classification could be based on the genotype.
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Affiliation(s)
- Ange-Line Bruel
- FHU-TRANSLAD, Université de Bourgogne/CHU Dijon, Dijon, France.,Équipe EA42271 GAD, Université de Bourgogne, Dijon, France
| | - Brunella Franco
- Department of Translational Medicine, Medical Genetics Ferderico II University of Naples, Naples, Italy.,Telethon Institute of Genetics and Medicine-TIGEM, Naples, Italy
| | - Yannis Duffourd
- FHU-TRANSLAD, Université de Bourgogne/CHU Dijon, Dijon, France.,Équipe EA42271 GAD, Université de Bourgogne, Dijon, France
| | - Julien Thevenon
- FHU-TRANSLAD, Université de Bourgogne/CHU Dijon, Dijon, France.,Équipe EA42271 GAD, Université de Bourgogne, Dijon, France.,Centre de Référence maladies rares « Anomalies du Développement et syndrome malformatifs » de l'Est et Centre de Génétique, Hôpital d'Enfants, CHU, Dijon, France
| | - Laurence Jego
- FHU-TRANSLAD, Université de Bourgogne/CHU Dijon, Dijon, France.,Équipe EA42271 GAD, Université de Bourgogne, Dijon, France
| | - Estelle Lopez
- Équipe EA42271 GAD, Université de Bourgogne, Dijon, France
| | | | - Diane Doummar
- APHP, hôpital TROUSSEAU, Centre de référence des malformations et maladies congénitales du cervelet et département de génétique, Paris, France
| | - Rachel H Giles
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Colin A Johnson
- Section of Ophthalmology and Neurosciences, Leeds Institute of Molecular Medicine, University of Leeds, Leeds, UK
| | - Martijn A Huynen
- Centre for Molecular and Biomolecular Informatics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Véronique Chevrier
- Centre de Recherche en Cancérologie de Marseille, Marseille, France.,Institut Paoli-Calmettes, Marseille, France.,CNRS U7258, Marseille, France.,Aix-Marseille Université, Marseille, France
| | - Lydie Burglen
- APHP, hôpital TROUSSEAU, Centre de référence des malformations et maladies congénitales du cervelet et département de génétique, Paris, France
| | - Manuela Morleo
- Équipe EA42271 GAD, Université de Bourgogne, Dijon, France.,Department of Translational Medicine, Medical Genetics Ferderico II University of Naples, Naples, Italy
| | - Isabelle Desguerres
- Service de neurométabolisme, Hôpital Necker-Enfants Malades, CHU, Paris, France
| | | | - Bérénice Doray
- Service de Génétique Médicale, Hôpital de Hautepierre, CHU, Strasbourg, France
| | | | - Bruno Reversade
- Laboratory of Human Embryology and Genetics, Institute of Medical Biology, Singapore
| | | | - Clarisse Baumann
- Département de Génétique, Unité Fonctionelle de Génétique Clinique, Hôpital Robert Debré, CHU, Paris, France
| | - Inusha Panigrahi
- Genetic-Metabolic Unit, Department of Pediatrics, Advanced Pediatric Centre, PGIMER, Chandigarh, India
| | - Anne Fargeot-Espaliat
- Pédiatrie Neonatalogie, Centre Hospitalier Général, Brive-la-Gaillarde, Brive-la-Gaillarde, France
| | - Anne Dieux
- Centre de Référence CLAD NdF, Service de Génétique Clinique, Hôpital Jeanne de Flandre, CHRU, Lille, France
| | - Albert David
- Service de Génétique Médicale, Unité de Génétique Clinique, Hôpital Mère-Enfant, CHU, Nantes, France
| | - Alice Goldenberg
- Service de Génétique, CHU de Rouen, Centre Normand de Génomique Médicale et Médecine Personnalisée, Rouen, France
| | - Ernie Bongers
- Department of Human Genetics, Radboud University, Nijmegen, The Netherlands
| | | | - Jesús Argente
- Department of Pediatrics & Pediatric Endocrinology, Hospital Infantil Universitario Niño Jesús, Madrid, Spain.,Department of Pediatrics, Universidad Autónoma de Madrid, Madrid, Spain.,CIBEROBN de fisiopatología de la obesidad y nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - Bernard Aral
- Laboratoire de Génétique Moléculaire, PTB, CHU, Dijon, France
| | - Nadège Gigot
- FHU-TRANSLAD, Université de Bourgogne/CHU Dijon, Dijon, France.,Équipe EA42271 GAD, Université de Bourgogne, Dijon, France.,Laboratoire de Génétique Moléculaire, PTB, CHU, Dijon, France
| | - Judith St-Onge
- FHU-TRANSLAD, Université de Bourgogne/CHU Dijon, Dijon, France.,Équipe EA42271 GAD, Université de Bourgogne, Dijon, France
| | - Daniel Birnbaum
- Centre de Recherche en Cancérologie de Marseille, Marseille, France.,Institut Paoli-Calmettes, Marseille, France.,CNRS U7258, Marseille, France.,Aix-Marseille Université, Marseille, France
| | - Shubha R Phadke
- Department of Medical Genetics, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India
| | - Valérie Cormier-Daire
- Department of Translational Medicine, Medical Genetics Ferderico II University of Naples, Naples, Italy.,INSERM UMR1163, Université de Paris-Descartes-Sorbonne Paris Cité, Institut IMAGINE, Hôpital Necker-Enfants Malades, Paris, France.,Service de génétique médicale, Hôpital Universitaire Necker-Enfants Malades, AP-HP, Institut Imagine, Paris, France
| | - Thibaut Eguether
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Gregory J Pazour
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Vicente Herranz-Pérez
- Laboratorio de Neurobiología Comparada, Instituto Cavanilles, Universitat de València, CIBERNED, Valencia, Spain.,Unidad mixta de Esclerosis Múltiple y Neurorregeneración, IIS Hospital La Fe-UVEG, Valencia, Spain
| | - Jaclyn S Goldstein
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, California, USA
| | - Laurent Pasquier
- Centre de Référence Maladies Rares, Unité Fonctionnelle de Génétique Médicale, CHU, Rennes, France
| | - Philippe Loget
- Laboratoire d'Anatomie-Pathologie, CHU Rennes, Rennes, France
| | - Sophie Saunier
- INSERM U983, Institut IMAGINE, Hôpital Necker-Enfants Malades, Paris, France.,Département de Génétique, Hôpital Necker-Enfants Malades, AP-HP, Paris, France
| | | | - Olivier Rosnet
- Centre de Recherche en Cancérologie de Marseille, Marseille, France.,Institut Paoli-Calmettes, Marseille, France.,CNRS U7258, Marseille, France.,Aix-Marseille Université, Marseille, France
| | - Michel R Leroux
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada.,Centre for Cell Biology, Development and Disease, Simon Fraser University, Burnaby, British Columbia, Canada
| | - John B Wallingford
- Department of Molecular Biosciences, Center for Systems and Synthetic Biology, University of Texas at Austin, Austin, Texas, USA.,Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas, USA
| | - Oliver E Blacque
- School of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
| | - Maxence V Nachury
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, California, USA
| | - Tania Attie-Bitach
- INSERM UMR1163, Université de Paris-Descartes-Sorbonne Paris Cité, Institut IMAGINE, Hôpital Necker-Enfants Malades, Paris, France.,Service de génétique médicale, Hôpital Universitaire Necker-Enfants Malades, AP-HP, Institut Imagine, Paris, France.,Département de Génétique, Hôpital Necker-Enfants Malades, AP-HP, Paris, France
| | - Jean-Baptiste Rivière
- FHU-TRANSLAD, Université de Bourgogne/CHU Dijon, Dijon, France.,Équipe EA42271 GAD, Université de Bourgogne, Dijon, France.,Laboratoire de Génétique Moléculaire, PTB, CHU, Dijon, France
| | - Laurence Faivre
- FHU-TRANSLAD, Université de Bourgogne/CHU Dijon, Dijon, France.,Équipe EA42271 GAD, Université de Bourgogne, Dijon, France.,Centre de Référence maladies rares « Anomalies du Développement et syndrome malformatifs » de l'Est et Centre de Génétique, Hôpital d'Enfants, CHU, Dijon, France
| | - Christel Thauvin-Robinet
- FHU-TRANSLAD, Université de Bourgogne/CHU Dijon, Dijon, France.,Équipe EA42271 GAD, Université de Bourgogne, Dijon, France.,Centre de Référence maladies rares « Anomalies du Développement et syndrome malformatifs » de l'Est et Centre de Génétique, Hôpital d'Enfants, CHU, Dijon, France
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Haidar Z, Temanni R, Chouery E, Jithesh P, Liu W, Al-Ali R, Wang E, Marincola FM, Jalkh N, Haddad S, Haidar W, Chouchane L, Mégarbané A. Erratum to: Diagnosis implications of the whole genome sequencing in a large Lebanese family with hyaline fibromatosis syndrome. BMC Genet 2017; 18:9. [PMID: 28148224 PMCID: PMC5286771 DOI: 10.1186/s12863-017-0480-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 01/27/2017] [Indexed: 12/04/2022] Open
Affiliation(s)
- Zahraa Haidar
- Unité de Génétique Médicale, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon
| | - Ramzi Temanni
- Bioinformatics Division, Sidra Medical & Research Center, Doha, Qatar
| | - Eliane Chouery
- Unité de Génétique Médicale, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon
| | - Puthen Jithesh
- Bioinformatics Division, Sidra Medical & Research Center, Doha, Qatar
| | - Wei Liu
- Genomics Core Laboratory, Translational Medicine Division, Sidra Medical & Research Center, Doha, Qatar
| | - Rashid Al-Ali
- Bioinformatics Division, Sidra Medical & Research Center, Doha, Qatar
| | - Ena Wang
- Genomics Core Laboratory, Translational Medicine Division, Sidra Medical & Research Center, Doha, Qatar
| | | | - Nadine Jalkh
- Unité de Génétique Médicale, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon
| | - Soha Haddad
- Department of Radiology, Hotel Dieu de France University hospital-Beirut, Beirut, Lebanon
| | - Wassim Haidar
- Department of General surgery, Dar Al Amal University Hospital-Baalbeck, Baalbeck, Lebanon
| | - Lotfi Chouchane
- Laboratory of Genetic Medicine and Immunology, Weill Cornell Medicine-Qatar, Doha, Qatar
| | - André Mégarbané
- Institut Jérôme Lejeune, 37, rue des Volontaires, Paris, 75015, France.
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Haidar Z, Temanni R, Chouery E, Jitesh P, Liu W, Al-Ali R, Wang E, Marincola FM, Jalkh N, Haddad S, Haidar W, Chouchane L, Mégarbané A. Diagnosis implications of the whole genome sequencing in a large Lebanese family with hyaline fibromatosis syndrome. BMC Genet 2017; 18:3. [PMID: 28103792 PMCID: PMC5244738 DOI: 10.1186/s12863-017-0471-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 01/10/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Hyaline fibromatosis syndrome (HFS) is a recently introduced alternative term for two disorders that were previously known as juvenile hyaline fibromatosis (JHF) and infantile systemic hyalinosis (ISH). These two variants are secondary to mutations in the anthrax toxin receptor 2 gene (ANTXR2) located on chromosome 4q21. The main clinical features of both entities include papular and/or nodular skin lesions, gingival hyperplasia, joint contractures and osteolytic bone lesions that appear in the first few years of life, and the syndrome typically progresses with the appearance of new lesions. METHODS We describe five Lebanese patients from one family, aged between 28 and 58 years, and presenting with nodular and papular skin lesions, gingival hyperplasia, joint contractures and bone lesions. Because of the particular clinical features and the absence of a clinical diagnosis, Whole Genome Sequencing (WGS) was carried out on DNA samples from the proband and his parents. RESULTS A mutation in ANTXR2 (p. Gly116Val) that yielded a diagnosis of HFS was noted. CONCLUSIONS The main goal of this paper is to add to the knowledge related to the clinical and radiographic aspects of HFS in adulthood and to show the importance of Next-Generation Sequencing (NGS) techniques in resolving such puzzling cases.
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Affiliation(s)
- Zahraa Haidar
- Unité de Génétique Médicale, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon
| | - Ramzi Temanni
- Bioinformatics Division, Sidra Medical & Research Center, Doha, Qatar
| | - Eliane Chouery
- Unité de Génétique Médicale, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon
| | - Puthen Jitesh
- Bioinformatics Division, Sidra Medical & Research Center, Doha, Qatar
| | - Wei Liu
- Genomics Core Laboratory, Translational Medicine Division, Sidra Medical & Research Center, Doha, Qatar
| | - Rashid Al-Ali
- Bioinformatics Division, Sidra Medical & Research Center, Doha, Qatar
| | - Ena Wang
- Genomics Core Laboratory, Translational Medicine Division, Sidra Medical & Research Center, Doha, Qatar
| | | | - Nadine Jalkh
- Unité de Génétique Médicale, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon
| | - Soha Haddad
- Department of Radiology, Hotel Dieu de France University hospital–Beirut, Beirut, Lebanon
| | - Wassim Haidar
- Department of General surgery, Dar Al Amal University Hospital-Baalbeck, Baalbeck, Lebanon
| | - Lotfi Chouchane
- Laboratory of Genetic Medicine and Immunology, Weill Cornell Medicine-Qatar, Doha, Qatar
| | - André Mégarbané
- Institut Jérôme Lejeune, 37, rue des Volontaires, Paris, 75015 France
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Khneisser I, Adib SM, Loiselet J, Mégarbané A. Prevalence of G6PD deficiency and knowledge of diagnosis in a sample of previously unscreened Lebanese males: clinical implications. J Med Screen 2016; 13:26-8. [PMID: 16569302 DOI: 10.1258/096914106776179827] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The incidence of glucose-6-phosphate dehydrogenase (G6PD) deficiency in Lebanon is estimated at 10 per 1000 in men and 0.4 per 1000 in women. A community-based cluster sampling survey was conducted in 15 villages in all areas in Lebanon. The survey found 36 cases of G6PD deficiency among 3000 men aged 14 years and above, yielding a cumulative incidence rate of 12 per 1000. Of those 36 cases, 28 (77.8%) knew of their problem since they had already suffered at least one severe anaemia crisis in their childhood following the ingestion of raw green fava beans. The remaining 22.2% were not aware at all of their defect. These findings confirm that G6PD is a common genetic problem in Lebanon. The efficiency of early screening programmes in terms of preventing severe, at times potentially lethal, haemolytic crises is currently being investigated.
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Affiliation(s)
- Issam Khneisser
- Newborn Screening Laboratory, Medical Genetic Unit, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon.
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Mégarbané A, Al-Ali R, Choucair N, Lek M, Wang E, Ladjimi M, Rose CM, Hobeika R, Macary Y, Temanni R, Jithesh PV, Chouchane A, Sastry KS, Thomas R, Tomei S, Liu W, Marincola FM, MacArthur D, Chouchane L. Temple-Baraitser Syndrome and Zimmermann-Laband Syndrome: one clinical entity? BMC Med Genet 2016; 17:42. [PMID: 27282200 PMCID: PMC4901505 DOI: 10.1186/s12881-016-0304-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 06/02/2016] [Indexed: 01/07/2023]
Abstract
BACKGROUND KCNH1 encodes a voltage-gated potassium channel that is predominantly expressed in the central nervous system. Mutations in this gene were recently found to be responsible for Temple-Baraitser Syndrome (TMBTS) and Zimmermann-Laband syndrome (ZLS). METHODS Here, we report a new case of TMBTS diagnosed in a Lebanese child. Whole genome sequencing was carried out on DNA samples of the proband and his parents to identify mutations associated with this disease. Sanger sequencing was performed to confirm the presence of detected variants. RESULTS Whole genome sequencing revealed three missense mutations in TMBTS patient: c.1042G > A in KCNH1, c.2131 T > C in STK36, and c.726C > A in ZNF517. According to all predictors, mutation in KCNH1 is damaging de novo mutation that results in substitution of Glycine by Arginine, i.e., p.(Gly348Arg). This mutation was already reported in a patient with ZLS that could affect the connecting loop between helices S4-S5 of KCNH1 with a gain of function effect. CONCLUSIONS Our findings demonstrate that KCNH1 mutations cause TMBTS and expand the mutational spectrum of KCNH1 in TMBTS. In addition, all cases of TMBTS were reviewed and compared to ZLS. We suggest that the two syndromes are a continuum and that the variability in the phenotypes is the result of the involvement of genetic modifiers.
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Affiliation(s)
| | - Rashid Al-Ali
- Bioinformatics Division, Sidra Medical & Research Center, Doha, Qatar
| | | | - Monko Lek
- Medical and Population Genetics, Broad Institute of Harvard Medical School, Boston, USA
| | - Ena Wang
- Genomics Core Laboratory, Translational Medicine Division, Sidra Medical & Research Center, Doha, Qatar
| | - Moncef Ladjimi
- Laboratory of Protein Chemistry, Weill Cornell Medicine-Qatar, Doha, Qatar
| | - Catherine M Rose
- POSSUMweb, Victorian Clinical Genetics Service and Murdoch Childrens Research Institute, The Royal Children's Hospital, Parkville, VIC, Australia
| | | | | | - Ramzi Temanni
- Bioinformatics Division, Sidra Medical & Research Center, Doha, Qatar
| | - Puthen V Jithesh
- Bioinformatics Division, Sidra Medical & Research Center, Doha, Qatar
| | - Aouatef Chouchane
- Dermatology Research Group, Translational Medicine Division, Sidra Medical & Research Center, Doha, Qatar
| | - Konduru S Sastry
- Dermatology Research Group, Translational Medicine Division, Sidra Medical & Research Center, Doha, Qatar
| | - Remy Thomas
- Laboratory of Genetic Medicine and Immunology, Weill Cornell Medicine-Qatar, Education City, Qatar Foundation, Doha, Qatar
| | - Sara Tomei
- Genomics Core Laboratory, Translational Medicine Division, Sidra Medical & Research Center, Doha, Qatar
| | - Wei Liu
- Genomics Core Laboratory, Translational Medicine Division, Sidra Medical & Research Center, Doha, Qatar
| | | | - Daniel MacArthur
- Medical and Population Genetics, Broad Institute of Harvard Medical School, Boston, USA
| | - Lotfi Chouchane
- Laboratory of Genetic Medicine and Immunology, Weill Cornell Medicine-Qatar, Education City, Qatar Foundation, Doha, Qatar.
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Boyden SE, Desai A, Cruse G, Young ML, Bolan HC, Scott LM, Eisch AR, Long RD, Lee CCR, Satorius CL, Pakstis AJ, Olivera A, Mullikin JC, Chouery E, Mégarbané A, Medlej-Hashim M, Kidd KK, Kastner DL, Metcalfe DD, Komarow HD. Vibratory Urticaria Associated with a Missense Variant in ADGRE2. N Engl J Med 2016; 374:656-63. [PMID: 26841242 PMCID: PMC4782791 DOI: 10.1056/nejmoa1500611] [Citation(s) in RCA: 118] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Patients with autosomal dominant vibratory urticaria have localized hives and systemic manifestations in response to dermal vibration, with coincident degranulation of mast cells and increased histamine levels in serum. We identified a previously unknown missense substitution in ADGRE2 (also known as EMR2), which was predicted to result in the replacement of cysteine with tyrosine at amino acid position 492 (p.C492Y), as the only nonsynonymous variant cosegregating with vibratory urticaria in two large kindreds. The ADGRE2 receptor undergoes autocatalytic cleavage, producing an extracellular subunit that noncovalently binds a transmembrane subunit. We showed that the variant probably destabilizes an autoinhibitory subunit interaction, sensitizing mast cells to IgE-independent vibration-induced degranulation. (Funded by the National Institutes of Health.).
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Affiliation(s)
- Steven E Boyden
- From the Inflammatory Disease Section, National Human Genome Research Institute (S.E.B., C.L.S., D.L.K.), Mast Cell Biology Section, National Institute of Allergy and Infectious Diseases, (A.D., G.C., H.C.B., L.M.S., A.R.E., A.O., D.D.M., H.D.K.), Laboratory of Pathology, National Cancer Institute (C.-C.R.L.), and National Institutes of Health (NIH) Intramural Sequencing Center, National Human Genome Research Institute (J.C.M.), NIH, Bethesda, and Clinical Research Directorate-Clinical Monitoring Research Program, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research, Frederick (M.L.Y.) - both in Maryland; Veterinary Pathology Section, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, NIH, Hamilton, MT (R.D.L.); the Department of Genetics, Yale University School of Medicine, New Haven, CT (A.J.P., K.K.K.); Medical Genetics Unit, Saint Joseph University, Beirut (E.C.) and Department of Life and Earth Sciences, Faculty of Sciences II, Lebanese University, Fanar (M.M.-H.) - both in Lebanon; and Institut Jérôme Lejeune, Paris (A.M.)
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Yoon G, Delague V, Mégarbané A, Isaya G. Reply: Autosomal recessive cerebellar ataxia caused by a homozygous mutation in PMPCA. Brain 2015; 139:e20. [PMID: 26657516 DOI: 10.1093/brain/awv363] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 10/26/2015] [Indexed: 11/13/2022] Open
Affiliation(s)
- Grace Yoon
- 1 Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | | | - André Mégarbané
- 3 Unité de Génétique Médicale and Laboratoire Associé Inserm UMR S_910, Faculté de Médecine, Université Saint Joseph, Beirut, Lebanon
| | - Grazia Isaya
- 4 Department of Paediatric and Adolescent Medicine and Mayo Clinic Children's Centre, Mayo Clinic, Rochester, MN, USA
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Capo-Chichi JM, Mehawej C, Delague V, Caillaud C, Khneisser I, Hamdan FF, Michaud JL, Kibar Z, Mégarbané A. Neuroblastoma Amplified Sequence (NBAS) mutation in recurrent acute liver failure: Confirmatory report in a sibship with very early onset, osteoporosis and developmental delay. Eur J Med Genet 2015; 58:637-41. [PMID: 26578240 DOI: 10.1016/j.ejmg.2015.11.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 11/06/2015] [Accepted: 11/07/2015] [Indexed: 02/08/2023]
Abstract
BACKGROUND Recently, biallelic mutations in the Neuroblastoma Amplified Sequence NBAS gene have been identified in ten patients that present recurrent acute liver failure (RALF) in early infancy. In addition to severe liver dysfunction, some of these individuals also suffered from other comorbidities including cardiomyopathy, neurologic phenotypes and gastrointestinal immune defects. Here we report on a consanguineous Lebanese family with three siblings affected by RALF. Of note, neonatal spontaneous fractures, developmental delay, prominent eyes, generalized hirsutism, gum hypertrophy, and hepato-splenomegaly were also present. METHODS Whole-genome SNP genotyping in all the patients, followed by exome sequencing was performed in one of the affected siblings. RESULTS A homozygous c.409C > T (p.Arg137Trp) missense mutation in NBAS was identified in all patients. CONCLUSION Overall, our findings confirm the involvement of NBAS in the pathogenesis of this condition characterized by severe liver dysfunction and help expand its phenotypical spectrum.
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Affiliation(s)
| | - Cybel Mehawej
- Unité de Génétique Médicale, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon.
| | - Valerie Delague
- Inserm, UMR_S 910, 13385 Marseille, France; Aix Marseille Université, GMGF, 13385 Marseille, France.
| | - Catherine Caillaud
- Service de Biochimie Médicale, Hôpital Necker Enfants Malades, Paris 75015, France.
| | - Issam Khneisser
- Unité de Génétique Médicale, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon.
| | - Fadi F Hamdan
- CHU Sainte-Justine Research Center, Montreal H3T 1C5, Canada.
| | - Jacques L Michaud
- CHU Sainte-Justine Research Center, Montreal H3T 1C5, Canada; Department of Pediatrics and Department of Neurosciences, Université de Montreal, Montreal, Canada.
| | - Zoha Kibar
- CHU Sainte-Justine Research Center, Montreal H3T 1C5, Canada.
| | - André Mégarbané
- Unité de Génétique Médicale, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon; Institut Jérôme Lejeune, Paris, France.
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38
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Vodopiutz J, Seidl R, Prayer D, Khan MI, Mayr JA, Streubel B, Steiß JO, Hahn A, Csaicsich D, Castro C, Assoum M, Müller T, Wieczorek D, Mancini GMS, Sadowski CE, Lévy N, Mégarbané A, Godbole K, Schanze D, Hildebrandt F, Delague V, Janecke AR, Zenker M. WDR73 Mutations Cause Infantile Neurodegeneration and Variable Glomerular Kidney Disease. Hum Mutat 2015; 36:1021-8. [PMID: 26123727 DOI: 10.1002/humu.22828] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 06/23/2015] [Indexed: 01/16/2023]
Abstract
Infantile-onset cerebellar atrophy (CA) is a clinically and genetically heterogeneous trait. Galloway-Mowat syndrome (GMS) is a rare autosomal recessive disease, characterized by microcephaly with brain anomalies including CA in some cases, intellectual disability, and early-infantile-onset nephrotic syndrome. Very recently, WDR73 deficiency was identified as the cause of GMS in five individuals. To evaluate the role of WDR73 mutations as a cause of GMS and other forms of syndromic CA, we performed Sanger or exome sequencing in 51 unrelated patients with CA and variable brain anomalies and in 40 unrelated patients with a diagnosis of GMS. We identified 10 patients from three CA and from two GMS families with WDR73 mutations including the original family described with CA, mental retardation, optic atrophy, and skin abnormalities (CAMOS). There were five novel mutations, of which two were truncating and three were missense mutations affecting highly conserved residues. Individuals carrying homozygous WDR73 mutations mainly presented with a pattern of neurological and neuroimaging findings as well as intellectual disability, while kidney involvement was variable. We document postnatal onset of CA, a retinopathy, basal ganglia degeneration, and short stature as novel features of WDR73-related disease, and define WDR73-related disease as a new entity of infantile neurodegeneration.
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Affiliation(s)
- Julia Vodopiutz
- Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Austria
| | - Rainer Seidl
- Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Austria
| | - Daniela Prayer
- Division of Neuroradiology and Musculoskeletal Radiology, Medical University of Vienna, Austria
| | - M Imran Khan
- Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Johannes A Mayr
- Department of Pediatrics, Paracelsus Medical University, Salzburg, Austria
| | - Berthold Streubel
- Department of Obstetrics and Feto-Maternal Medicine, Medical University of Vienna, Austria
| | | | - Andreas Hahn
- Department of Child Neurology, Justus-Liebig-University, Gießen, Germany
| | - Dagmar Csaicsich
- Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Austria
| | - Christel Castro
- Inserm, UMR_S 910, 13385, Marseille, France.,Aix Marseille Université, GMGF, Marseille, France
| | - Mirna Assoum
- Inserm, UMR_S 910, 13385, Marseille, France.,Aix Marseille Université, GMGF, Marseille, France
| | - Thomas Müller
- Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | | | - Grazia M S Mancini
- Department of Clinical Genetics, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Carolin E Sadowski
- Harvard Medical School, Boston Children's Hospital, Boston, Massachusetts.,Department of Gynecology and Obstetrics, University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany
| | - Nicolas Lévy
- Inserm, UMR_S 910, 13385, Marseille, France.,Aix Marseille Université, GMGF, Marseille, France.,Département de Génétique Médicale, Hôpital d'Enfants de la Timone, AP-HM, Marseille, France
| | - André Mégarbané
- Université Saint Joseph, Campus des Sciences Médicales, Unité de génétique médicale, Lebanon.,Institut Jérôme Lejeune, Paris, France
| | - Koumudi Godbole
- Deenanath Mangeshkar Hospital & Research Center, Erandawane, Pune, India
| | - Denny Schanze
- Institute of Human Genetics, University Hospital, Magdeburg, Germany
| | | | - Valérie Delague
- Inserm, UMR_S 910, 13385, Marseille, France.,Aix Marseille Université, GMGF, Marseille, France
| | - Andreas R Janecke
- Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria.,Division of Human Genetics, Medical University of Innsbruck, Innsbruck, Austria
| | - Martin Zenker
- Institute of Human Genetics, University Hospital, Magdeburg, Germany.,Institute of Human Genetics, University of Erlangen, Erlangen, Germany
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Choucair N, Abou Ghoch J, Fawaz A, Mégarbané A, Chouery E. 10q26.1 Microdeletion: Redefining the critical regions for microcephaly and genital anomalies. Am J Med Genet A 2015; 167A:2707-13. [DOI: 10.1002/ajmg.a.37211] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 06/04/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Nancy Choucair
- Unité de Génétique Médicale et Laboratoire Associé INSERM à l'Unité UMR_S 910; Faculté de Médecine; Université Saint-Joseph; Beirut Lebanon
- Faculté de Médecine de la Timone; Aix-Marseille Université; Marseille France
- Institut National de la Santé et de la Recherche Médicale; UMR_S910; Marseille France
| | - Joelle Abou Ghoch
- Unité de Génétique Médicale et Laboratoire Associé INSERM à l'Unité UMR_S 910; Faculté de Médecine; Université Saint-Joseph; Beirut Lebanon
| | - Ali Fawaz
- Neuropediatrics Department; Lebanese University; Beirut Lebanon
| | - André Mégarbané
- Unité de Génétique Médicale et Laboratoire Associé INSERM à l'Unité UMR_S 910; Faculté de Médecine; Université Saint-Joseph; Beirut Lebanon
- Institut Jérôme Lejeune; Paris France
| | - Eliane Chouery
- Unité de Génétique Médicale et Laboratoire Associé INSERM à l'Unité UMR_S 910; Faculté de Médecine; Université Saint-Joseph; Beirut Lebanon
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40
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Choucair N, Mignon-Ravix C, Cacciagli P, Abou Ghoch J, Fawaz A, Mégarbané A, Villard L, Chouery E. Evidence that homozygous PTPRD gene microdeletion causes trigonocephaly, hearing loss, and intellectual disability. Mol Cytogenet 2015; 8:39. [PMID: 26082802 PMCID: PMC4469107 DOI: 10.1186/s13039-015-0149-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 06/04/2015] [Indexed: 12/03/2022] Open
Abstract
Background The premature fusion of metopic sutures results in the clinical phenotype of trigonocephaly. An association of this characteristic with the monosomy 9p syndrome is well established and the receptor-type protein tyrosine phosphatase gene (PTPRD), located in the 9p24.1p23 region and encoding a major component of the excitatory and inhibitory synaptic organization, is considered as a good candidate to be responsible for this form of craniosynostosis. Moreover PTPRD is known to recruit multiple postsynaptic partners such as IL1RAPL1 which gene alterations lead to non syndromic intellectual disability (ID). Results We describe a 30 month old boy with severe intellectual disability, trigonocephaly and dysmorphic facial features such as a midface hypoplasia, a flat nose, a depressed nasal bridge, hypertelorism, a long philtrum and a drooping mouth. Microarray chromosomal analysis revealed the presence of a homozygous deletion involving the PTPRD gene, located on chromosome 9p22.3. Reverse Transcription PCR (RT-PCR) amplifications all along the gene failed to amplify the patient's cDNA in fibroblasts, indicating the presence of two null PTPRD alleles. Synaptic PTPRD interacts with IL1RAPL1 which defects have been associated with intellectual disability (ID) and autism spectrum disorder. The absence of the PTPRD transcript leads to a decrease in the expression of IL1RAPL1. These results suggest the direct involvement of PTPRD in ID, which is consistent with the PTPRD -/- mice phenotype. Deletions of PTPRD have been previously suggested as a cause of trigonocephaly in patients with monosomy 9p and genome-wide association study suggested variations in PTPRD are associated with hearing loss. Conclusions The deletion identified in the reported patient supports previous hypotheses on its function in ID and hearing loss. However, its involvement in the occurrence of metopic synostosis is still to be discussed as more investigation of patients with the 9p monosomy syndrome is required.
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Affiliation(s)
- Nancy Choucair
- Unité de Génétique Médicale et Laboratoire Associé INSERM à l'Unité UMR_S 910, Faculté de Médecine, Université Saint-Joseph, rue de Damas B.P. 17-5208 Mar Mikhael, Beyrouth, 11042020 Lebanon ; Aix-Marseille Université, GMGF, Marseille, France ; INSERM, UMR_S 910, Marseille, France
| | - Cecile Mignon-Ravix
- Aix-Marseille Université, GMGF, Marseille, France ; INSERM, UMR_S 910, Marseille, France
| | - Pierre Cacciagli
- Aix-Marseille Université, GMGF, Marseille, France ; INSERM, UMR_S 910, Marseille, France ; Département de Génétique Médicale, Assitance Publique Hôpitaux de Marseille, Hôpital d'Enfants de La Timone, Marseille, France
| | - Joelle Abou Ghoch
- Unité de Génétique Médicale et Laboratoire Associé INSERM à l'Unité UMR_S 910, Faculté de Médecine, Université Saint-Joseph, rue de Damas B.P. 17-5208 Mar Mikhael, Beyrouth, 11042020 Lebanon
| | - Ali Fawaz
- Neuropediatrics Department, Lebanese University, Beirut, Lebanon
| | - André Mégarbané
- Unité de Génétique Médicale et Laboratoire Associé INSERM à l'Unité UMR_S 910, Faculté de Médecine, Université Saint-Joseph, rue de Damas B.P. 17-5208 Mar Mikhael, Beyrouth, 11042020 Lebanon ; Institut Jérôme Lejeune, Paris, France
| | - Laurent Villard
- Aix-Marseille Université, GMGF, Marseille, France ; INSERM, UMR_S 910, Marseille, France
| | - Eliane Chouery
- Unité de Génétique Médicale et Laboratoire Associé INSERM à l'Unité UMR_S 910, Faculté de Médecine, Université Saint-Joseph, rue de Damas B.P. 17-5208 Mar Mikhael, Beyrouth, 11042020 Lebanon
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41
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Augière C, Mégy S, El Malti R, Boland A, El Zein L, Verrier B, Mégarbané A, Deleuze JF, Bouvagnet P. A Novel Alpha Cardiac Actin (ACTC1) Mutation Mapping to a Domain in Close Contact with Myosin Heavy Chain Leads to a Variety of Congenital Heart Defects, Arrhythmia and Possibly Midline Defects. PLoS One 2015; 10:e0127903. [PMID: 26061005 PMCID: PMC4464657 DOI: 10.1371/journal.pone.0127903] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 04/20/2015] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND A Lebanese Maronite family presented with 13 relatives affected by various congenital heart defects (mainly atrial septal defects), conduction tissue anomalies and midline defects. No mutations were found in GATA4 and NKX2-5. METHODS AND RESULTS A set of 399 poly(AC) markers was used to perform a linkage analysis which peaked at a 2.98 lod score on the long arm of chromosome 15. The haplotype analysis delineated a 7.7 meganucleotides genomic interval which included the alpha-cardiac actin gene (ACTC1) among 36 other protein coding genes. A heterozygous missense mutation was found (c.251T>C, p.(Met84Thr)) in the ACTC1 gene which changed a methionine residue conserved up to yeast. This mutation was absent from 1000 genomes and exome variant server database but segregated perfectly in this family with the affection status. This mutation and 2 other ACTC1 mutations (p.(Glu101Lys) and p.(Met125Val)) which result also in congenital heart defects are located in a region in close apposition to a myosin heavy chain head region by contrast to 3 other alpha-cardiac actin mutations (p.(Ala297Ser),p.(Asp313His) and p.(Arg314His)) which result in diverse cardiomyopathies and are located in a totally different interaction surface. CONCLUSIONS Alpha-cardiac actin mutations lead to congenital heart defects, cardiomyopathies and eventually midline defects. The consequence of an ACTC1 mutation may in part be dependent on the interaction surface between actin and myosin.
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Affiliation(s)
- Céline Augière
- EA 4173, Université Lyon 1 and Hôpital Nord-Ouest, Lyon, France
| | - Simon Mégy
- IBCP, UMR 5305 CNRS and Université Lyon 1, Lyon, France
| | - Rajae El Malti
- Laboratoire Cardiogénétique Malformation, Centre de Biologie et Pathologie Est, Hospices Civils de Lyon, Bron, France
| | | | - Loubna El Zein
- EA 4173, Université Lyon 1 and Hôpital Nord-Ouest, Lyon, France
| | | | - André Mégarbané
- Unité de Génétique Médicale, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon
- Institut Jérôme Lejeune, Paris, France
| | | | - Patrice Bouvagnet
- EA 4173, Université Lyon 1 and Hôpital Nord-Ouest, Lyon, France
- Laboratoire Cardiogénétique Malformation, Centre de Biologie et Pathologie Est, Hospices Civils de Lyon, Bron, France
- Service de Cardiologie Pédiatrique, Hôpital Louis Pradel, Hospices Civils de Lyon, Bron, France
- * E-mail:
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42
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Jobling RK, Assoum M, Gakh O, Blaser S, Raiman JA, Mignot C, Roze E, Dürr A, Brice A, Lévy N, Prasad C, Paton T, Paterson AD, Roslin NM, Marshall CR, Desvignes JP, Roëckel-Trevisiol N, Scherer SW, Rouleau GA, Mégarbané A, Isaya G, Delague V, Yoon G. PMPCA mutations cause abnormal mitochondrial protein processing in patients with non-progressive cerebellar ataxia. Brain 2015; 138:1505-17. [PMID: 25808372 PMCID: PMC4542620 DOI: 10.1093/brain/awv057] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Revised: 12/09/2014] [Accepted: 01/06/2015] [Indexed: 11/13/2022] Open
Abstract
Non-progressive cerebellar ataxias are a rare group of disorders that comprise approximately 10% of static infantile encephalopathies. We report the identification of mutations in PMPCA in 17 patients from four families affected with cerebellar ataxia, including the large Lebanese family previously described with autosomal recessive cerebellar ataxia and short stature of Norman type and localized to chromosome 9q34 (OMIM #213200). All patients present with non-progressive cerebellar ataxia, and the majority have intellectual disability of variable severity. PMPCA encodes α-MPP, the alpha subunit of mitochondrial processing peptidase, the primary enzyme responsible for the maturation of the vast majority of nuclear-encoded mitochondrial proteins, which is necessary for life at the cellular level. Analysis of lymphoblastoid cells and fibroblasts from patients homozygous for the PMPCA p.Ala377Thr mutation and carriers demonstrate that the mutation impacts both the level of the alpha subunit encoded by PMPCA and the function of mitochondrial processing peptidase. In particular, this mutation impacts the maturation process of frataxin, the protein which is depleted in Friedreich ataxia. This study represents the first time that defects in PMPCA and mitochondrial processing peptidase have been described in association with a disease phenotype in humans.
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Affiliation(s)
- Rebekah K Jobling
- 1 Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Mirna Assoum
- 2 Inserm, UMR_S 910, 13385, Marseille, France 3 Aix Marseille Université, GMGF, 13385, Marseille, France
| | - Oleksandr Gakh
- 4 Department of Paediatric and Adolescent Medicine and Mayo Clinic Children's Centre, Mayo Clinic, Rochester, MN, USA
| | - Susan Blaser
- 5 Division of Neuroradiology, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Julian A Raiman
- 1 Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Cyril Mignot
- 6 Département de Génétique, Unité de Génétique Clinique, APHP, Groupe Hospitalier Pitié-Salpêtrière; Centre de Référence Maladies Rares 'Déficiences Intellectuelles de Causes Rares'; Groupe de Recherche Clinique UPMC Univ Paris 06; Paris, France
| | - Emmanuel Roze
- 7 Sorbonne Université, UPMC Univ Paris 06, UM 75, ICM, F-75013 Paris, France 8 Inserm, U 1127, ICM, F-75013 Paris, France 9 Cnrs, UMR 7225, ICM, F-75013 Paris, France 10 ICM, Paris, F-75013 Paris, France 11 AP-HP, Hôpital de la Salpêtrière, Département de Neurologie, F-75013, Paris, France
| | - Alexandra Dürr
- 7 Sorbonne Université, UPMC Univ Paris 06, UM 75, ICM, F-75013 Paris, France 8 Inserm, U 1127, ICM, F-75013 Paris, France 9 Cnrs, UMR 7225, ICM, F-75013 Paris, France 10 ICM, Paris, F-75013 Paris, France 12 AP-HP, Hôpital de la Salpêtrière, Département de Génétique et Cytogénétique, F-75013, Paris, France
| | - Alexis Brice
- 7 Sorbonne Université, UPMC Univ Paris 06, UM 75, ICM, F-75013 Paris, France 8 Inserm, U 1127, ICM, F-75013 Paris, France 9 Cnrs, UMR 7225, ICM, F-75013 Paris, France 10 ICM, Paris, F-75013 Paris, France 12 AP-HP, Hôpital de la Salpêtrière, Département de Génétique et Cytogénétique, F-75013, Paris, France
| | - Nicolas Lévy
- 2 Inserm, UMR_S 910, 13385, Marseille, France 3 Aix Marseille Université, GMGF, 13385, Marseille, France 13 Département de Génétique Médicale, Hôpital d'Enfants de la Timone, AP-HM, Marseille, France
| | - Chitra Prasad
- 14 Medical Genetics Program, Department of Pediatrics, London Health Sciences Centre, London, Ontario, Canada
| | - Tara Paton
- 15 The Centre for Applied Genomics and Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada
| | - Andrew D Paterson
- 15 The Centre for Applied Genomics and Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada
| | - Nicole M Roslin
- 15 The Centre for Applied Genomics and Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada
| | - Christian R Marshall
- 15 The Centre for Applied Genomics and Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada
| | - Jean-Pierre Desvignes
- 2 Inserm, UMR_S 910, 13385, Marseille, France 3 Aix Marseille Université, GMGF, 13385, Marseille, France
| | - Nathalie Roëckel-Trevisiol
- 2 Inserm, UMR_S 910, 13385, Marseille, France 3 Aix Marseille Université, GMGF, 13385, Marseille, France
| | - Stephen W Scherer
- 15 The Centre for Applied Genomics and Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada 16 McLaughlin Centre and Department of Molecular Genetics, University of Toronto
| | - Guy A Rouleau
- 17 Montreal Neurological Institute and Hospital and Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada
| | - André Mégarbané
- 18 Unité de Génétique Médicale and Laboratoire Associé Inserm UMR S_910, Faculté de Médecine, Université Saint Joseph, Beirut, Lebanon 19 Institut Jérôme Lejeune, Paris, France
| | - Grazia Isaya
- 4 Department of Paediatric and Adolescent Medicine and Mayo Clinic Children's Centre, Mayo Clinic, Rochester, MN, USA
| | - Valérie Delague
- 2 Inserm, UMR_S 910, 13385, Marseille, France 3 Aix Marseille Université, GMGF, 13385, Marseille, France
| | - Grace Yoon
- 1 Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada 20 Division of Neurology, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
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Terhal PA, Nievelstein RJAJ, Verver EJJ, Topsakal V, van Dommelen P, Hoornaert K, Le Merrer M, Zankl A, Simon MEH, Smithson SF, Marcelis C, Kerr B, Clayton-Smith J, Kinning E, Mansour S, Elmslie F, Goodwin L, van der Hout AH, Veenstra-Knol HE, Herkert JC, Lund AM, Hennekam RCM, Mégarbané A, Lees MM, Wilson LC, Male A, Hurst J, Alanay Y, Annerén G, Betz RC, Bongers EMHF, Cormier-Daire V, Dieux A, David A, Elting MW, van den Ende J, Green A, van Hagen JM, Hertel NT, Holder-Espinasse M, den Hollander N, Homfray T, Hove HD, Price S, Raas-Rothschild A, Rohrbach M, Schroeter B, Suri M, Thompson EM, Tobias ES, Toutain A, Vreeburg M, Wakeling E, Knoers NV, Coucke P, Mortier GR. A study of the clinical and radiological features in a cohort of 93 patients with aCOL2A1mutation causing spondyloepiphyseal dysplasia congenita or a related phenotype. Am J Med Genet A 2015; 167A:461-75. [DOI: 10.1002/ajmg.a.36922] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 10/22/2014] [Indexed: 11/05/2022]
Affiliation(s)
- Paulien A. Terhal
- Department of Medical Genetics; University Medical Centre Utrecht; Utrecht The Netherlands
| | | | - Eva J. J. Verver
- Department of Otorhinolaryngology and Head and Neck Surgery; Rudolf Magnus Institute of Neuroscience; University Medical Centre Utrecht; Utrecht The Netherlands
| | - Vedat Topsakal
- Department of Otorhinolaryngology and Head and Neck Surgery; Rudolf Magnus Institute of Neuroscience; University Medical Centre Utrecht; Utrecht The Netherlands
| | | | | | - Martine Le Merrer
- Department of Genetics, INSERM UMR_1163, Paris Descartes-Sorbonne Paris Cité University, Imagine Institute; Hôpital Necker-Enfants Malades; Paris France
| | - Andreas Zankl
- Academic Department of Medical Genetics; Discipline of Genetic Medicine, The University of Sydney; Sydney Children's Hospital Network (Westmead); Sydney Australia
| | - Marleen E. H. Simon
- Department of Clinical Genetics; Erasmus Medical Centre; University Medical Centre; Rotterdam The Netherlands
| | - Sarah F. Smithson
- Department of Clinical Genetics; St. Michael's Hospital; Bristol United Kingdom
| | - Carlo Marcelis
- Department of Human Genetics; Nijmegen Centre for Molecular Life Sciences; Institute for Genetic and Metabolic Disease; Radboud University Medical Centre; Nijmegen The Netherlands
| | - Bronwyn Kerr
- Manchester Centre For Genomic Medicine, University of Manchester; St Mary's Hospital; Manchester United Kingdom
| | - Jill Clayton-Smith
- Manchester Centre For Genomic Medicine, University of Manchester; St Mary's Hospital; Manchester United Kingdom
| | - Esther Kinning
- Department of Clinical Genetics; Southern General Hospital; Glasgow United Kingdom
| | - Sahar Mansour
- SW Thames Regional Genetics Service; St George's NHS Trust; London United Kingdom
| | - Frances Elmslie
- SW Thames Regional Genetics Service; St George's NHS Trust; London United Kingdom
| | - Linda Goodwin
- Department of Genetics; Nepean Hospital; Penrith Australia
| | | | | | - Johanna C. Herkert
- Department of Genetics; University Medical Centre Groningen; Groningen The Netherlands
| | - Allan M. Lund
- Centre for Inherited Metabolic Diseases; Department of Clinical Genetics; Copenhagen University Hospital; Copenhagen Denmark
| | - Raoul C. M. Hennekam
- Department of Pediatrics; Academic Medical Centre; University of Amsterdam; Amsterdam The Netherlands
| | - André Mégarbané
- Unité de Génétique Médicale et Laboratoire Associé Institut National de la Santé et de la Recherche Médicale UMR-S910; Université Saint-Joseph; Beirut Lebanon
| | - Melissa M. Lees
- Department of Clinical Genetics; Great Ormond Street Hospital; London United Kingdom
| | - Louise C. Wilson
- Department of Clinical Genetics; Great Ormond Street Hospital; London United Kingdom
| | - Alison Male
- Department of Clinical Genetics; Great Ormond Street Hospital; London United Kingdom
| | - Jane Hurst
- Department of Clinical Genetics; Great Ormond Street Hospital; London United Kingdom
- Department of Clinical Genetics; Churchill Hospital; Oxford United Kingdom
| | - Yasemin Alanay
- Pediatric Genetics Unit; Department of Pediatrics; Acibadem University School of Medicine; Istanbul Turkey
| | - Göran Annerén
- Department of Immunology; Genetics and Pathology; Science for Life Laboratory; Uppsala University; Uppsala Sweden
| | - Regina C. Betz
- Institute of Human Genetics; University of Bonn; Bonn Germany
| | - Ernie M. H. F. Bongers
- Department of Human Genetics; Nijmegen Centre for Molecular Life Sciences; Institute for Genetic and Metabolic Disease; Radboud University Medical Centre; Nijmegen The Netherlands
| | - Valerie Cormier-Daire
- Department of Genetics, INSERM UMR_1163, Paris Descartes-Sorbonne Paris Cité University, Imagine Institute; Hôpital Necker-Enfants Malades; Paris France
| | - Anne Dieux
- Service de Génétique Clinique; Hôpital Jeanne de Flandre; Lille France
| | - Albert David
- Service de Génétique Médicale; CHU de Nantes; Nantes France
| | - Mariet W. Elting
- Department of Clinical Genetics; VU University Medical Centre; Amsterdam The Netherlands
| | - Jenneke van den Ende
- Department of Medical Genetics; Antwerp University Hospital; University of Antwerp; Edegem Belgium
| | - Andrew Green
- National Centre for Medical Genetics and School of Medicine and Medical Science; University College Dublin, Our Lady's Hospital Crumlin; Dublin Ireland
| | - Johanna M. van Hagen
- Department of Clinical Genetics; VU University Medical Centre; Amsterdam The Netherlands
| | - Niels Thomas Hertel
- H.C. Andersen Children's Hospital; Odense University Hospital; Odense Denmark
| | - Muriel Holder-Espinasse
- Service de Génétique Clinique; Hôpital Jeanne de Flandre; Lille France
- Department of Clinical Genetics; Guy's Hospital; London United Kingdom
| | | | | | - Hanne D. Hove
- Department of Clinical Genetics; Rigshospitalet; Copenhagen Denmark
| | - Susan Price
- Department of Clinical Genetics; Churchill Hospital; Oxford United Kingdom
| | - Annick Raas-Rothschild
- Institute of Medical Genetics; Meir Medical Centre, Kfar Saba, and Sackler School of Medicine Tel Aviv University; Tel Aviv Israel
| | - Marianne Rohrbach
- Division of Metabolism, Children's Research Centre, Connective Tissue Unit; University Children's Hospital Zurich; Zurich Switzerland
| | | | - Mohnish Suri
- Nottingham Clinical Genetics Service, City Hospital Campus; Nottingham University Hospitals NHS Trust; Nottingham United Kingdom
| | - Elizabeth M. Thompson
- SA Clinical Genetics, SA Pathology at the Women's and Children's Hospital, North Adelaide, South Australia, Australia and Department of Paediatrics; University of Adelaide; Adelaide North Terrace, South Australia
| | - Edward S. Tobias
- Medical Genetics, School of Medicine, Coll Med Vet and Life Sci; University of Glasgow; Glasgow Scotland
| | | | - Maaike Vreeburg
- Department of Clinical Genetics; Maastricht University Medical Centre; Maastricht The Netherlands
| | - Emma Wakeling
- North West Thames Regional Genetic Service; North West London Hospitals NHS Trust; London United Kingdom
| | - Nine V. Knoers
- Department of Medical Genetics; University Medical Centre Utrecht; Utrecht The Netherlands
| | - Paul Coucke
- Department of Medical Genetics; Ghent University Hospital; Ghent Belgium
- Ghent University; Ghent Belgium
| | - Geert R. Mortier
- Department of Medical Genetics; Antwerp University Hospital; University of Antwerp; Edegem Belgium
- Ghent University; Ghent Belgium
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Gannagé-Yared MH, Makrythanasis P, Chouery E, Sobacchi C, Mehawej C, Santoni FA, Guipponi M, Antonarakis SE, Hamamy H, Mégarbané A. Exome sequencing reveals a mutation in DMP1 in a family with familial sclerosing bone dysplasia. Bone 2014; 68:142-5. [PMID: 25180662 DOI: 10.1016/j.bone.2014.08.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 08/18/2014] [Accepted: 08/23/2014] [Indexed: 11/18/2022]
Abstract
INTRODUCTION Hypophosphatemic rickets (HR) comprises a rare group of inherited diseases. Very recently, mutations in the dentin matrix protein 1 (DMP1) gene were identified in patients with an extremely rare autosomal recessive form of HR (ARHR). To date, very few cases of these mutations were reported. MATERIALS AND METHODS A Lebanese consanguineous family with 2 affected sisters was studied. Patients aged 45 and 47years old presented with short stature, severe genu varum, cranial hyperostosis and a very high bone density that led to a diagnosis of a familial sclerosing bone dysplasia. Molecular analysis of known genes involved in osteopetrosis showed normal results. A combination of genotyping and exome sequencing was performed in order to elucidate the genetic basis of this pathology. RESULTS Biochemical analysis was consistent with normal serum calcium and 1-25(OH)2D levels, low to normal serum phosphorus and elevated PTH values. Serum c-terminal FGF-23 was elevated in one of the two patients. A homozygous mutation disrupting the initiation codon of the DMP1 gene (OMIM 600980), NM_001079911.2: c.1A>G, p.Met1Val, was identified by exome sequencing and confirmed by Sanger sequencing. CONCLUSION We report here a family of ARHR secondary to a DMP1 mutation located in the first coding exon of the gene. Our cases show that some ARHR cases may develop with age an unaccountable increase in bone density and bone overgrowth.
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Affiliation(s)
| | - Periklis Makrythanasis
- Department of Genetic Medicine and Development, University of Geneva, Geneva, Switzerland; Service of Genetic Medicine, University Hospitals of Geneva, Geneva, Switzerland.
| | - Eliane Chouery
- Unité de Génétique Médicale, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon.
| | - Cristina Sobacchi
- CNR/IRGB, UOS Milan Unit, Milan, Italy; Humanitas Clinical and Research Center, Rozzano, Milano, Italy.
| | - Cybel Mehawej
- Unité de Génétique Médicale, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon.
| | - Federico A Santoni
- Department of Genetic Medicine and Development, University of Geneva, Geneva, Switzerland.
| | - Michel Guipponi
- Service of Genetic Medicine, University Hospitals of Geneva, Geneva, Switzerland.
| | - Stylianos E Antonarakis
- Department of Genetic Medicine and Development, University of Geneva, Geneva, Switzerland; Service of Genetic Medicine, University Hospitals of Geneva, Geneva, Switzerland; iGE3 Institute of Genetics and Genomics of Geneva, Geneva, Switzerland.
| | - Hanan Hamamy
- Department of Genetic Medicine and Development, University of Geneva, Geneva, Switzerland.
| | - André Mégarbané
- Département d'Endocrinologie, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon; Institut Jérôme Lejeune, Paris, France.
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45
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Makrythanasis P, Nelis M, Santoni FA, Guipponi M, Vannier A, Béna F, Gimelli S, Stathaki E, Temtamy S, Mégarbané A, Masri A, Aglan MS, Zaki MS, Bottani A, Fokstuen S, Gwanmesia L, Aliferis K, Bustamante Eduardo M, Stamoulis G, Psoni S, Kitsiou-Tzeli S, Fryssira H, Kanavakis E, Al-Allawi N, Sefiani A, Al Hait S, Elalaoui SC, Jalkh N, Al-Gazali L, Al-Jasmi F, Bouhamed HC, Abdalla E, Cooper DN, Hamamy H, Antonarakis SE. Diagnostic exome sequencing to elucidate the genetic basis of likely recessive disorders in consanguineous families. Hum Mutat 2014; 35:1203-10. [PMID: 25044680 DOI: 10.1002/humu.22617] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Accepted: 06/30/2014] [Indexed: 01/19/2023]
Abstract
Rare, atypical, and undiagnosed autosomal-recessive disorders frequently occur in the offspring of consanguineous couples. Current routine diagnostic genetic tests fail to establish a diagnosis in many cases. We employed exome sequencing to identify the underlying molecular defects in patients with unresolved but putatively autosomal-recessive disorders in consanguineous families and postulated that the pathogenic variants would reside within homozygous regions. Fifty consanguineous families participated in the study, with a wide spectrum of clinical phenotypes suggestive of autosomal-recessive inheritance, but with no definitive molecular diagnosis. DNA samples from the patient(s), unaffected sibling(s), and the parents were genotyped with a 720K SNP array. Exome sequencing and array CGH (comparative genomic hybridization) were then performed on one affected individual per family. High-confidence pathogenic variants were found in homozygosity in known disease-causing genes in 18 families (36%) (one by array CGH and 17 by exome sequencing), accounting for the clinical phenotype in whole or in part. In the remainder of the families, no causative variant in a known pathogenic gene was identified. Our study shows that exome sequencing, in addition to being a powerful diagnostic tool, promises to rapidly expand our knowledge of rare genetic Mendelian disorders and can be used to establish more detailed causative links between mutant genotypes and clinical phenotypes.
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Affiliation(s)
- Periklis Makrythanasis
- Department of Genetic Medicine and Development, University of Geneva, Geneva, Switzerland; Service of Genetic Medicine, University Hospitals of Geneva, Geneva, Switzerland
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46
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Mignon-Ravix C, Cacciagli P, Choucair N, Popovici C, Missirian C, Milh M, Mégarbané A, Busa T, Julia S, Girard N, Badens C, Sigaudy S, Philip N, Villard L. Intragenic rearrangements in X-linked intellectual deficiency: results of a-CGH in a series of 54 patients and identification of TRPC5 and KLHL15 as potential XLID genes. Am J Med Genet A 2014; 164A:1991-7. [PMID: 24817631 DOI: 10.1002/ajmg.a.36602] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Accepted: 04/03/2014] [Indexed: 01/24/2023]
Abstract
High-resolution array comparative genomic hybridization (a-CGH) enables the detection of intragenic rearrangements, such as single exon deletion or duplication. This approach can lead to the identification of new disease genes. We report on the analysis of 54 male patients presenting with intellectual deficiency (ID) and a family history suggesting X-linked (XL) inheritance or maternal skewed X-chromosome inactivation (XCI), using a home-made X-chromosome-specific microarray covering the whole human X-chromosome at high resolution. The majority of patients had whole genome array-CGH prior to the selection and we did not include large rearrangements such as MECP2 and FMR1 duplications. We identified four rearrangements considered as causative or potentially pathogenic, corresponding to a detection rate of 8%. Two CNVs affected known XLID genes and were therefore considered as causative (IL1RAPL1 and OPHN1 intragenic deletions). Two new CNVs were considered as potentially pathogenic as they affected interesting candidates for ID. The first CNV is a deletion of the first exon of the TRPC5 gene, encoding a cation channel implicated in dendrite growth and patterning, in a child presenting with ID and an autism spectrum disorder (ASD). The second CNV is a partial deletion of KLHL15, in a patient with severe ID, epilepsy, and anomalies of cortical development. In both cases, in spite of strong arguments for clinical relevance, we were not able at this stage to confirm pathogenicity of the mutations, and the causality of the variants identified in XLID remains to be confirmed.
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Affiliation(s)
- Cécile Mignon-Ravix
- Inserm, UMR_S 910, Marseille, France; Aix Marseille Université, GMGF, Marseille, France
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47
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Patel N, Khan AO, Mansour A, Mohamed JY, Al-Assiri A, Haddad R, Jia X, Xiong Y, Mégarbané A, Traboulsi EI, Alkuraya FS. Mutations in ASPH cause facial dysmorphism, lens dislocation, anterior-segment abnormalities, and spontaneous filtering blebs, or Traboulsi syndrome. Am J Hum Genet 2014; 94:755-9. [PMID: 24768550 DOI: 10.1016/j.ajhg.2014.04.002] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Accepted: 04/02/2014] [Indexed: 11/15/2022] Open
Abstract
We have previously described a syndrome characterized by facial dysmorphism, lens dislocation, anterior-segment abnormalities, and spontaneous filtering blebs (FDLAB, or Traboulsi syndrome). In view of the consanguineous nature of the affected families and the likely autosomal-recessive inheritance pattern of this syndrome, we undertook autozygosity mapping and whole-exome sequencing to identify ASPH as the disease locus, in which we identified two homozygous mutations. ASPH encodes aspartyl/asparaginyl β-hydroxylase (ASPH), which has been found to hydroxylate aspartic acid and asparagine residues on epidermal growth factor (EGF)-domain-containing proteins. The truncating and missense mutations we identified are predicted to severely impair the enzymatic function of ASPH, which suggests a possible link to other forms of ectopia lentis given that many of the genes implicated in this phenotype encode proteins that harbor EGF domains. Developmental analysis of Asph revealed an expression pattern consistent with the proposed link to the human syndrome. Indeed, Asph-knockout mice had a foreshortened snout, which corresponds to the facial abnormalities in individuals with Traboulsi syndrome. These data support a genetic basis for a syndromic form of ectopia lentis and the role of aspartyl hydroxylation in human development.
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Affiliation(s)
- Nisha Patel
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh 11211, Saudi Arabia
| | - Arif O Khan
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh 11211, Saudi Arabia; Division of Pediatric Ophthalmology, King Khaled Eye Specialist Hospital, Riyadh 11462, Saudi Arabia
| | - Ahmad Mansour
- Department of Ophthalmology, American University of Beirut, Beirut 1107-2020, Lebanon
| | - Jawahir Y Mohamed
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh 11211, Saudi Arabia
| | - Abdullah Al-Assiri
- Division of Anterior Segment, King Khaled Eye Specialist Hospital, Riyadh 11462, Saudi Arabia
| | - Randa Haddad
- Department of Ophthalmology, American University of Beirut, Beirut 1107-2020, Lebanon
| | - Xiaofei Jia
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA
| | - Yong Xiong
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA
| | - André Mégarbané
- Medical Genetics Unit, Faculty of Medicine, Saint Joseph University, Beirut 1104-2020, Lebanon
| | - Elias I Traboulsi
- Center for Genetic Eye Diseases, Cole Eye Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Fowzan S Alkuraya
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh 11211, Saudi Arabia; Department of Anatomy and Cell Biology, College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia.
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48
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Mehawej C, Delahodde A, Legeai-Mallet L, Delague V, Kaci N, Desvignes JP, Kibar Z, Capo-Chichi JM, Chouery E, Munnich A, Cormier-Daire V, Mégarbané A. The impairment of MAGMAS function in human is responsible for a severe skeletal dysplasia. PLoS Genet 2014; 10:e1004311. [PMID: 24786642 PMCID: PMC4006740 DOI: 10.1371/journal.pgen.1004311] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Accepted: 03/03/2014] [Indexed: 12/17/2022] Open
Abstract
Impairment of the tightly regulated ossification process leads to a wide range of skeletal dysplasias and deciphering their molecular bases has contributed to the understanding of this complex process. Here, we report a homozygous mutation in the mitochondria-associated granulocyte macrophage colony stimulating factor-signaling gene (MAGMAS) in a novel and severe spondylodysplastic dysplasia. MAGMAS, also referred to as PAM16 (presequence translocase-associated motor 16), is a mitochondria-associated protein involved in preprotein translocation into the matrix. We show that MAGMAS is specifically expressed in trabecular bone and cartilage at early developmental stages and that the mutation leads to an instability of the protein. We further demonstrate that the mutation described here confers to yeast strains a temperature-sensitive phenotype, impairs the import of mitochondrial matrix pre-proteins and induces cell death. The finding of deleterious MAGMAS mutations in an early lethal skeletal dysplasia supports a key role for this mitochondrial protein in the ossification process. Skeletal dysplasias (SD) refer to a complex group of rare genetic disorders affecting the growth and development of the skeleton. The identification of the molecular basis of a considerable number of SD has greatly expanded our knowledge of the ossification process. Among SD, spondylodysplastic dysplasia is a generic term describing different conditions characterized by severe vertebral abnormalities and distinct by additional specific features. Several entities within this group are well defined. However, a few cases remain unclassified, of which a novel autosomal recessive spondylometaphyseal dysplasia recently reported by Mégarbané et al. in two Lebanese families. Here, we identified MAGMAS as a candidate gene responsible for this severe SD. MAGMAS, also referred to as PAM16, is a mitochondria-associated protein, involved in pre-proteins import into mitochondria and essential for cell growth and development. We demonstrated that MAGMAS is expressed in bone and cartilage in early developmental stages underlining its specific role in skeletogenesis. We also give strong evidence of the deleterious effect of the identified mutation on the in-vivo activity of Magmas and the viability of yeast strains. Reporting deleterious MAGMAS mutation in a SD supports a key and specific role for this mitochondrial protein in ossification.
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Affiliation(s)
- Cybel Mehawej
- Unité de Génétique Médicale et Laboratoire International associé INSERM à l'Unité UMR_S 910, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon
- Département de Génétique, Unité INSERM U781, Université Paris Descartes-Sorbonne Paris Cité, Fondation Imagine, Hôpital Necker Enfants Malades, Paris, France
| | - Agnès Delahodde
- University of Paris-Sud, CNRS, UMR 8621, Institute of Genetics and Microbiology, Orsay, France
| | - Laurence Legeai-Mallet
- Département de Génétique, Unité INSERM U781, Université Paris Descartes-Sorbonne Paris Cité, Fondation Imagine, Hôpital Necker Enfants Malades, Paris, France
| | - Valérie Delague
- Inserm, UMR_S 910, Marseille, France
- Aix Marseille Université, GMGF, Marseille, France
| | - Nabil Kaci
- Département de Génétique, Unité INSERM U781, Université Paris Descartes-Sorbonne Paris Cité, Fondation Imagine, Hôpital Necker Enfants Malades, Paris, France
| | - Jean-Pierre Desvignes
- Inserm, UMR_S 910, Marseille, France
- Aix Marseille Université, GMGF, Marseille, France
| | - Zoha Kibar
- Center of Excellence in Neuroscience of Université de Montréal, Centre de Recherche du CHU Sainte-Justine, Montréal, Canada
- Department of Obstetrics and Gynecology, Université de Montréal, Montréal, Canada
| | - José-Mario Capo-Chichi
- Center of Excellence in Neuroscience of Université de Montréal, Centre de Recherche du CHU Sainte-Justine, Montréal, Canada
- Department of Obstetrics and Gynecology, Université de Montréal, Montréal, Canada
| | - Eliane Chouery
- Unité de Génétique Médicale et Laboratoire International associé INSERM à l'Unité UMR_S 910, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon
| | - Arnold Munnich
- Département de Génétique, Unité INSERM U781, Université Paris Descartes-Sorbonne Paris Cité, Fondation Imagine, Hôpital Necker Enfants Malades, Paris, France
| | - Valérie Cormier-Daire
- Département de Génétique, Unité INSERM U781, Université Paris Descartes-Sorbonne Paris Cité, Fondation Imagine, Hôpital Necker Enfants Malades, Paris, France
| | - André Mégarbané
- Unité de Génétique Médicale et Laboratoire International associé INSERM à l'Unité UMR_S 910, Faculté de Médecine, Université Saint-Joseph, Beirut, Lebanon
- * E-mail:
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49
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Velasco G, Walton EL, Sterlin D, Hédouin S, Nitta H, Ito Y, Fouyssac F, Mégarbané A, Sasaki H, Picard C, Francastel C. Germline genes hypomethylation and expression define a molecular signature in peripheral blood of ICF patients: implications for diagnosis and etiology. Orphanet J Rare Dis 2014; 9:56. [PMID: 24742017 PMCID: PMC4022050 DOI: 10.1186/1750-1172-9-56] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Accepted: 04/11/2014] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Immunodeficiency Centromeric Instability and Facial anomalies (ICF) is a rare autosomal recessive disease characterized by reduction in serum immunoglobulins with severe recurrent infections, facial dysmorphism, and more variable symptoms including mental retardation. ICF is directly related to a genomic methylation defect that mainly affects juxtacentromeric heterochromatin regions of certain chromosomes, leading to chromosomal rearrangements that constitute a hallmark of this syndrome upon cytogenetic testing. Mutations in the de novo DNA methyltransferase DNMT3B, the protein ZBTB24 of unknown function, or loci that remain to be identified, lie at its origin. Despite unifying features, common or distinguishing molecular signatures are still missing for this disease. METHOD We used the molecular signature that we identified in a mouse model for ICF1 to establish transcriptional biomarkers to facilitate diagnosis and understanding of etiology of the disease. We assayed the expression and methylation status of a set of genes whose expression is normally restricted to germ cells, directly in whole blood samples and epithelial cells of ICF patients. RESULTS We report that DNA hypomethylation and expression of MAEL and SYCE1 represent robust biomarkers, easily testable directly from uncultured cells to diagnose the most prevalent sub-type of the syndrome. In addition, we identified the first unifying molecular signatures for ICF patients. Of importance, we validated the use of our biomarkers to diagnose a baby born to a family with a sick child. Finally, our analysis revealed unsuspected complex molecular signatures in two ICF patients suggestive of a novel genetic etiology for the disease. CONCLUSIONS Early diagnosis of ICF syndrome is crucial since early immunoglobulin supplementation can improve the course of disease. However, ICF is probably underdiagnosed, especially in patients that present with incomplete phenotype or born to families with no affected relatives. The specific and robust biomarkers identified in this study could be introduced into routine clinical immunology or neurology departments to facilitate testing of patients with suspected ICF syndrome. In addition, as exemplified by two patients with a combination of molecular defects never described before, our data support the search for new types of mutations at the origin of ICF syndrome.
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Affiliation(s)
- Guillaume Velasco
- Université Paris Diderot-Paris7, CNRS UMR7216, Epigénétique et Destin Cellulaire, Case Courrier 7042; 35, rue Hélène Brion, 75205 Paris, France.
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50
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Piard J, Aral B, Vabres P, Holder-Espinasse M, Mégarbané A, Gauthier S, Capra V, Pierquin G, Callier P, Baumann C, Pasquier L, Baujat G, Martorell L, Rodriguez A, Brady AF, Boralevi F, González-Enseñat MA, Rio M, Bodemer C, Philip N, Cordier MP, Goldenberg A, Demeer B, Wright M, Blair E, Puzenat E, Parent P, Sznajer Y, Francannet C, DiDonato N, Boute O, Barlogis V, Moldovan O, Bessis D, Coubes C, Tardieu M, Cormier-Daire V, Sousa AB, Franques J, Toutain A, Tajir M, Elalaoui SC, Geneviève D, Thevenon J, Courcet JB, Rivière JB, Collet C, Gigot N, Faivre L, Thauvin-Robinet C. Search for ReCQL4 mutations in 39 patients genotyped for suspected Rothmund-Thomson/Baller-Gerold syndromes. Clin Genet 2014; 87:244-51. [PMID: 24635570 DOI: 10.1111/cge.12361] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 02/12/2014] [Accepted: 02/12/2014] [Indexed: 11/28/2022]
Abstract
Three overlapping conditions, namely Rothmund-Thomson (RTS), Baller-Gerold (BGS) and RAPADILINO syndromes, have been attributed to RECQL4 mutations. Differential diagnoses depend on the clinical presentation, but the numbers of known genes remain low, leading to the widespread prescription of RECQL4 sequencing. The aim of our study was therefore to determine the best clinical indicators for the presence of RECQL4 mutations in a series of 39 patients referred for RECQL4 molecular analysis and belonging to the RTS (27 cases) and BGS (12 cases) spectrum. One or two deleterious RECQL4 mutations were found in 10/27 patients referred for RTS diagnosis. Clinical and molecular reevaluation led to a different diagnosis in 7/17 negative cases, including Clericuzio-type poikiloderma with neutropenia, hereditary sclerosing poikiloderma, and craniosynostosis/anal anomalies/porokeratosis. No RECQL4 mutations were found in the BGS group without poikiloderma, confirming that RECQL4 sequencing was not indicated in this phenotype. One chromosomal abnormality and one TWIST mutation was found in this cohort. This study highlights the search for differential diagnoses before the prescription of RECQL4 sequencing in this clinically heterogeneous group. The combination of clinically defined subgroups and next-generation sequencing will hopefully bring to light new molecular bases of syndromes with poikiloderma, as well as BGS without poikiloderma.
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Affiliation(s)
- J Piard
- EA 4271 GAD "Génétique des Anomalies du Développement", IFR Santé STIC, Université de Bourgogne, Dijon, France; Centre de Génétique Humaine, CHU Besançon, Besançon, France
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